//www.koonmotors.com/news/earth_climate/pollution/ 污染的文章。空气污染,水污染, noise pollution, soil pollution and more. Read current events articles on pollution, pollution prevention and pollution control. en-us Fri, 07 Jul 2023 20:23:39 EDT Fri, 07 Jul 2023 20:23:39 EDT 60 //www.koonmotors.com/images/scidaily-logo-rss.png//www.koonmotors.com/news/earth_climate/pollution/ For more science news, visit ScienceDaily. //www.koonmotors.com/releases/2023/07/230706124549.htm The climate control used by termites in their mounds could inspire tomorrow's climate-smart buildings. New research shows that future buildings inspired by the termites could achieve the same effect as traditional climate control, but with greater energy efficiency and without its carbon dioxide footprint. Thu, 06 Jul 2023 12:45:49 EDT //www.koonmotors.com/releases/2023/07/230706124549.htm //www.koonmotors.com/releases/2023/07/230704110915.htm Sulphuric acid is the world's most used chemical. It is an important reagent used in many industries and it is used in the manufacture of everything from paper, pharmaceuticals and cosmetics to batteries, detergents and fertilizers. It is therefore a worldwide challenge that sulphuric acid often contains one of the most toxic substances -- mercury. Researchers have now developed a method that can reduce the levels of mercury in sulphuric acid by more than 90 per cent -- even from low levels. Tue, 04 Jul 2023 11:09:15 EDT //www.koonmotors.com/releases/2023/07/230704110915.htm //www.koonmotors.com/releases/2023/06/230629193238.htm Scientists have found the secret to felines' finesse at sniffing out food, friends and foes. A complex collection of tightly coiled bony airway structures gets the credit, according to the first detailed analysis of the domestic cat's nasal airway. Thu, 29 Jun 2023 19:32:38 EDT //www.koonmotors.com/releases/2023/06/230629193238.htm //www.koonmotors.com/releases/2023/06/230628130404.htm A new study finds that as rising global temperatures shift snow to rain, mountains across the Northern Hemisphere will be hotspots for extreme rainfall events that could trigger floods and landslides -- potentially impacting a quarter of the world's population. Wed, 28 Jun 2023 13:04:04 EDT //www.koonmotors.com/releases/2023/06/230628130404.htm //www.koonmotors.com/releases/2023/06/230626164158.htm Researchers estimate that gray whales feeding off the Oregon Coast consume up to 21 million microparticles per day, a finding informed in part by feces from the whales. Mon, 26 Jun 2023 16:41:58 EDT //www.koonmotors.com/releases/2023/06/230626164158.htm //www.koonmotors.com/releases/2023/06/230623161110.htm Air taxis may be coming to our cities in the near future, but a new study warns regulations will need to address dangerous wind gusts around city buildings and other urban infrastructure. Fri, 23 Jun 2023 16:11:10 EDT //www.koonmotors.com/releases/2023/06/230623161110.htm //www.koonmotors.com/releases/2023/06/230621164518.htm A new farming system aims to solve one of the biggest problems in modern agriculture: the overuse of fertilizers to improve crop yields and the resulting chemical runoff that pollutes the world's air and water. Wed, 21 Jun 2023 16:45:18 EDT //www.koonmotors.com/releases/2023/06/230621164518.htm //www.koonmotors.com/releases/2023/06/230621121040.htm Smoke particulates from wildfires could cause between 4,000 and 9,000 premature deaths and cost between $36 to $82 billion per year in the United States, according to new research. Wed, 21 Jun 2023 12:10:40 EDT //www.koonmotors.com/releases/2023/06/230621121040.htm //www.koonmotors.com/releases/2023/06/230621105432.htm Collaborators have created 'living-like' bioactive interior architecture designed to one day protect us from hidden airborne threats. This publication establishes that the lab's biomaterial manufacturing process is compatible with the leading-edge cell-free engineering that gives the bioactive sites their life-like properties. Wed, 21 Jun 2023 10:54:32 EDT //www.koonmotors.com/releases/2023/06/230621105432.htm //www.koonmotors.com/releases/2023/06/230620174445.htm 研究人员正在领导一个国际团队谁e goal is to create a framework to help governments in the U.S. and around the world assess and prioritize remediation strategies for orphaned oil and gas wells. These inactive wells represent environmental risks since they have the potential to contaminate water supplies, degrade ecosystems, and emit methane and other air pollutants that are harmful to human health. But plugging the wells also offers various potential environmental opportunities such as underground storage of carbon dioxide and hydrogen, or the development of geothermal energy systems. Tue, 20 Jun 2023 17:44:45 EDT //www.koonmotors.com/releases/2023/06/230620174445.htm //www.koonmotors.com/releases/2023/06/230619120149.htm Researchers have demonstrated how carbon dioxide can be captured from industrial processes -- or even directly from the air -- and transformed into clean, sustainable fuels using just the energy from the Sun. Mon, 19 Jun 2023 12:01:49 EDT //www.koonmotors.com/releases/2023/06/230619120149.htm //www.koonmotors.com/releases/2023/06/230616161910.htm About 47 million homes use natural gas or propane-burning cooktops and ovens. Researchers found that cooking with gas stoves can raise indoor levels of the carcinogen benzene above those found in secondhand smoke. Fri, 16 Jun 2023 16:19:10 EDT //www.koonmotors.com/releases/2023/06/230616161910.htm //www.koonmotors.com/releases/2023/06/230615183153.htm New work deploys a bold new approach for inferring the temperature sensitivity of ecosystem respiration -- which represents one side of the equation balancing carbon dioxide uptake and carbon dioxide output in terrestrial environments. This will improve scientists' models for climate change scenarios. Thu, 15 Jun 2023 18:31:53 EDT //www.koonmotors.com/releases/2023/06/230615183153.htm //www.koonmotors.com/releases/2023/06/230615183142.htm Engineers synthesized a superabsorbent material that can soak up a record amount of moisture from the air, even in desert-like conditions. Thu, 15 Jun 2023 18:31:42 EDT //www.koonmotors.com/releases/2023/06/230615183142.htm //www.koonmotors.com/releases/2023/06/230615105250.htm Areas of the ocean that are rich in marine life are having a bigger impact on our ecosystems and the climate than previously thought, new research suggests. Thu, 15 Jun 2023 10:52:50 EDT //www.koonmotors.com/releases/2023/06/230615105250.htm //www.koonmotors.com/releases/2023/06/230613110059.htm Researchers used four different types of port environments to investigate the levels of contaminants emitted from five different sources. They found that the combined emissions of metals and environmentally hazardous substances is putting the marine environment at risk. Ninety per cent of the harmful emissions came from ships fitted with scrubbers, whose purpose is to clean their exhaust gases. Tue, 13 Jun 2023 11:00:59 EDT //www.koonmotors.com/releases/2023/06/230613110059.htm //www.koonmotors.com/releases/2023/06/230612200428.htm Initial choices about fertilization and grass seeding could have a long-lasting effect on how plants and their associated microbes break down pollution in petroleum-contaminated soils. Mon, 12 Jun 2023 20:04:28 EDT //www.koonmotors.com/releases/2023/06/230612200428.htm //www.koonmotors.com/releases/2023/06/230612114722.htm Around the world, most people are regularly exposed to low or moderate levels of lead, cadmium and arsenic in the environment, increasing risk of coronary artery disease, stroke and peripheral artery disease, according to a new statement. Mon, 12 Jun 2023 11:47:22 EDT //www.koonmotors.com/releases/2023/06/230612114722.htm //www.koonmotors.com/releases/2023/06/230612114707.htm Two major ridesharing companies have promised all-electric fleets by 2030 in an effort to reduce their carbon footprint. To understand additional impacts of this transition, researchers conducted life-cycle comparisons of battery-powered electric vehicle fleets to a gas-powered one, using real-world rideshare data. They found up to a 45% reduction in greenhouse gas emissions from full electrification; however, traffic problems and air pollution could increase. Mon, 12 Jun 2023 11:47:07 EDT //www.koonmotors.com/releases/2023/06/230612114707.htm //www.koonmotors.com/releases/2023/06/230608120936.htm New research shows that clear-air turbulence increased in various regions around the world from 1979 -- 2020. Thu, 08 Jun 2023 12:09:36 EDT //www.koonmotors.com/releases/2023/06/230608120936.htm //www.koonmotors.com/releases/2023/06/230606111655.htm Burning coal doesn't only pollute the air. The resulting ash can leach toxic chemicals into the local environments where it's kept. New research shows that the toxicity of various ash stockpiles relies heavily on its nanoscale structures, which vary widely between sources. The results will help researchers predict which coal ash is most environmentally dangerous. Tue, 06 Jun 2023 11:16:55 EDT //www.koonmotors.com/releases/2023/06/230606111655.htm //www.koonmotors.com/releases/2023/06/230605181255.htm The accelerating loss of biodiversity and increasing rate of species extinction is a major threat to ecosystems around the globe. And yet, quantifying those losses at a large scale hasn't been possible, in large part due to a lack of the required infrastructure. But a new study shows that a major source for such information already exists in the form of environmental DNA (eDNA), which has been inadvertently collected in filters by thousands of ambient air quality monitoring stations in countries around the world for decades. Mon, 05 Jun 2023 18:12:55 EDT //www.koonmotors.com/releases/2023/06/230605181255.htm //www.koonmotors.com/releases/2023/06/230605181216.htm New work uses cutting-edge CRISPR/Cas9 genome editing tools to reveal a gene that's critical to stony corals' ability to build their reef architectures. This research could inform coral conservation and restoration efforts. Mon, 05 Jun 2023 18:12:16 EDT //www.koonmotors.com/releases/2023/06/230605181216.htm //www.koonmotors.com/releases/2023/05/230531102022.htm Chemical and environmental engineering scientists have identified two species of bacteria found in soil that break down a class of stubborn 'forever chemicals'-- per- and poly-fluoroalkyl substances, or PFAS, that have contaminated groundwater below industrial and military sites throughout the nation. The discovery gives hope for low-cost biological cleanup of these pollutants. Wed, 31 May 2023 10:20:22 EDT //www.koonmotors.com/releases/2023/05/230531102022.htm //www.koonmotors.com/releases/2023/05/230530174304.htm A group of world leading health and scientific experts are calling on the aviation industry to take action to protect passengers and aircrew from dangerous cabin fumes which they say have led to a new emerging disease. Led by former pilot and aviation health researcher, the specialists have released the first medical protocol of its kind to help treat those effected by contamination of the aircraft cabin breathing air supply and collect data on contamination events. Tue, 30 May 2023 17:43:04 EDT //www.koonmotors.com/releases/2023/05/230530174304.htm //www.koonmotors.com/releases/2023/05/230530125450.htm A detailed plan to transform product packaging and significantly cut plastic production and pollution has been developed by researchers. The study comes as government representatives meet in Paris to negotiate a legally binding global plastics treaty with a mandate to end plastic pollution. Tue, 30 May 2023 12:54:50 EDT //www.koonmotors.com/releases/2023/05/230530125450.htm //www.koonmotors.com/releases/2023/05/230526121110.htm A ground-breaking study has revealed that plants can efficiently remove toxic gasoline fumes, including cancer causing compounds such as benzene, from indoor air. Fri, 26 May 2023 12:11:10 EDT //www.koonmotors.com/releases/2023/05/230526121110.htm //www.koonmotors.com/releases/2023/05/230524182045.htm The effects of the ground on propeller noise have now been measured experimentally. Wed, 24 May 2023 18:20:45 EDT //www.koonmotors.com/releases/2023/05/230524182045.htm //www.koonmotors.com/releases/2023/05/230524181948.htm A team of engineers has recently shown that nearly any material can be turned into a device that continuously harvests electricity from humidity in the air. Researchers describe the 'generic Air-gen effect'-- nearly any material can be engineered with nanopores to harvest, cost effective, scalable, interruption-free electricity. The secret lies in being able to pepper the material with nanopores less than 100 nanometers in diameter. Wed, 24 May 2023 18:19:48 EDT //www.koonmotors.com/releases/2023/05/230524181948.htm //www.koonmotors.com/releases/2023/05/230524181816.htm A new study has revealed that drying laundry using a condenser tumble dryer leads to hundreds of tons of potentially harmful microfibers being released into waterways and oceans across the UK and Europe. Wed, 24 May 2023 18:18:16 EDT //www.koonmotors.com/releases/2023/05/230524181816.htm //www.koonmotors.com/releases/2023/05/230524181813.htm A new study tracked the ability of natural, synthetic, and blended fabrics to biodegrade directly in the ocean. Wed, 24 May 2023 18:18:13 EDT //www.koonmotors.com/releases/2023/05/230524181813.htm //www.koonmotors.com/releases/2023/05/230522131349.htm Study sheds new light on the adverse health effects of air pollution: hydrogen peroxide production of fine particles may not be as important as previously assumed. A new study reveals that the adverse health effects of fine particulate matter (PM2.5) are attributable to the conversion of peroxides into more reactive species such as the hydroxyl radical (OH) rather than the direct chemical production of hydrogen peroxide (H2O2) as previously thought. Mon, 22 May 2023 13:13:49 EDT //www.koonmotors.com/releases/2023/05/230522131349.htm //www.koonmotors.com/releases/2023/05/230519104544.htm As cities are densified at a fast pace, there is now construction very close to roads and thoroughfares. It is already known that noise can have a negative impact on human health, but new research shows that as little as 40 decibels of traffic noise -- the typical level of background noise in an office environment or kitchen -- has a detrimental effect on cognitive performance. Fri, 19 May 2023 10:45:44 EDT //www.koonmotors.com/releases/2023/05/230519104544.htm //www.koonmotors.com/releases/2023/05/230517122123.htm 新的研究数据分析近地表空气的脾气atures recorded for North-West Europe over the past 60 years. The findings show that the maximum temperature of the hottest days is increasing at twice the rate of the maximum temperature of average summer days. The results highlight the need for urgent action by policy makers to adapt essential infrastructure to the impacts of climate change. Wed, 17 May 2023 12:21:23 EDT //www.koonmotors.com/releases/2023/05/230517122123.htm //www.koonmotors.com/releases/2023/05/230516115532.htm Up to two-thirds of the soot above the central Amazon rainforest originates in Africa. Researchers differentiate soot particles using their relative properties and attribute them to their respective points of origin. They found that bush fires and burning savannah in the north and south of Africa make a substantial contribution to air pollution in the central Amazon all year round, thereby playing an important role in the earth radiation budget and water cycle. This is caused by the efficient transatlantic transport of particles through the atmosphere. Tue, 16 May 2023 11:55:32 EDT //www.koonmotors.com/releases/2023/05/230516115532.htm //www.koonmotors.com/releases/2023/05/230515131959.htm Researchers have developed porous crystals made from pomegranate extract to capture and degrade pharmaceutical molecules found in local municipal wastewater. Mon, 15 May 2023 13:19:59 EDT //www.koonmotors.com/releases/2023/05/230515131959.htm //www.koonmotors.com/releases/2023/05/230511164627.htm Engineers have developed a new sponge that can remove metals -- including toxic heavy metals like lead and critical metals like cobalt -- from contaminated water, leaving safe, drinkable water behind. In proof-of-concept experiments, the researchers tested their new sponge on a highly contaminated sample of tap water, containing more than 1 part per million of lead. With one use, the sponge filtered lead to below detectable levels. Thu, 11 May 2023 16:46:27 EDT //www.koonmotors.com/releases/2023/05/230511164627.htm //www.koonmotors.com/releases/2023/05/230511164619.htm Improved cookstoves, which are widely used for cooking in developing countries, produce twice as many harmful ultrafine air pollution particles (PM0.1) as conventional stoves, according to a new study. Thu, 11 May 2023 16:46:19 EDT //www.koonmotors.com/releases/2023/05/230511164619.htm //www.koonmotors.com/releases/2023/05/230509122120.htm The theory that water-breathing animals such as fish will shrink due to global warming has been called into question by a new study. Tue, 09 May 2023 12:21:20 EDT //www.koonmotors.com/releases/2023/05/230509122120.htm //www.koonmotors.com/releases/2023/05/230509122112.htm Living organisms are exposed to nanoparticles through different products and air pollution every day. After examining hundreds of exposures, researchers revealed how various species share a specific epigenetic molecular response to particulate matter. They have now explained the mechanism through which cells and organisms adapt to long-term exposures to nano-sized materials. Tue, 09 May 2023 12:21:12 EDT //www.koonmotors.com/releases/2023/05/230509122112.htm //www.koonmotors.com/releases/2023/05/230508150931.htm Discarded or drifting in the ocean, plastic debris can accumulate on the water's surface, forming floating islands of garbage. Although it's harder to spot, researchers suspect a significant amount also sinks. In a new study in ACS' Environmental Science & Technology, one team used computer modeling to study how far bits of lightweight plastic travel when falling into the Mediterranean Sea. Their results suggest these particles can drift farther underwater than previously thought. Mon, 08 May 2023 15:09:31 EDT //www.koonmotors.com/releases/2023/05/230508150931.htm //www.koonmotors.com/releases/2023/05/230508114018.htm A new study found that air pollution from the oil and gas sector in the United States has substantial adverse impacts on air quality, human health, and health costs. The findings show that the pollutants nitrogen oxide (NO2), fine particulate matter (PM2.5) and ozone (O3) from U.S. oil and gas production contributed to 7,500 excess deaths, 410,000 asthma attacks, and 2,200 new cases of childhood asthma across the U.S. in 2016. Mon, 08 May 2023 11:40:18 EDT //www.koonmotors.com/releases/2023/05/230508114018.htm //www.koonmotors.com/releases/2023/04/230426210408.htm A new study investigated the combined effect of temperature and humidity on urban heat stress using observational data and an urban climate model calculation. Researchers found that the heat stress burden is dependent on local climate and a humidifying effect can erase the cooling benefits that would come from trees and vegetation. Wed, 26 Apr 2023 21:04:08 EDT //www.koonmotors.com/releases/2023/04/230426210408.htm //www.koonmotors.com/releases/2023/04/230425111147.htm 研究人员开发一个increa制造方法se the efficacy and longevity of membrane separation technology. The team created a nanofibrous membrane with electrospinning, in which a liquid polymer droplet is electrified and stretched to make fibers, and increased the roughness of the membrane surface by loading it with silver nanoparticles. In water, this rough surface promotes a stable layer of water, which acts as a barrier to prevent oil droplets from entering the membrane. The technology is greater than 99% effective at separating a petroleum ether-in-water emulsion. Tue, 25 Apr 2023 11:11:47 EDT //www.koonmotors.com/releases/2023/04/230425111147.htm //www.koonmotors.com/releases/2023/04/230424223140.htm New research shows that poor air quality could be causing cognitive problems in babies and toddlers. A new study reveals an association between poor air quality in India and impaired cognition in infants under two. Without action, the negative impact on children's long-term brain development could have consequences for life. Mon, 24 Apr 2023 22:31:40 EDT //www.koonmotors.com/releases/2023/04/230424223140.htm //www.koonmotors.com/releases/2023/04/230420110133.htm The new classification system demonstrates the effects wetlands have on water quality at a continental scale -- invaluable data that can be used to better define whether wetlands are federally regulated under the U.S. Clean Water Act. Thu, 20 Apr 2023 11:01:33 EDT //www.koonmotors.com/releases/2023/04/230420110133.htm //www.koonmotors.com/releases/2023/04/230418101419.htm 一个可行的减碳公式,环境tally friendly concrete that is nearly as strong as regular concrete has been developed. In a proof-of-concept work, the researchers infused regular cement with environmentally friendly biochar, a type of charcoal made from organic waste, that had been strengthened beforehand with concrete wastewater. The biochar was able to suck up to 23% of its weight in carbon dioxide from the air while still reaching a strength comparable to ordinary cement. The research could significantly reduce carbon emissions of the concrete industry, which is one of the most energy- and carbon-intensive of all manufacturing industries. Tue, 18 Apr 2023 10:14:19 EDT //www.koonmotors.com/releases/2023/04/230418101419.htm //www.koonmotors.com/releases/2023/04/230417142508.htm Using a new detection method, scientists found a massive amount of methane, a super-potent greenhouse gas, coming from wildfires -- a source not currently being accounted for by California state air quality managers. Mon, 17 Apr 2023 14:25:08 EDT //www.koonmotors.com/releases/2023/04/230417142508.htm //www.koonmotors.com/releases/2023/04/230413154455.htm Human activity is contributing to pollution that is affecting our health. According to WHO estimates, atmospheric air pollution is estimated to cause 4.2 million premature deaths worldwide per year. Scientists and the public alike are well aware of how human activity and pollution is affecting our heath, but new research has identified how bumblebees may be caught in the crossfire. Thu, 13 Apr 2023 15:44:55 EDT //www.koonmotors.com/releases/2023/04/230413154455.htm //www.koonmotors.com/releases/2023/04/230413011748.htm A research team assesses neighborhood-scale NO2 exposure using a European satellite. High-rise apartment complexes are a significant source of emissions that should be considered in the development of clean air policies. Thu, 13 Apr 2023 01:17:48 EDT //www.koonmotors.com/releases/2023/04/230413011748.htm //www.koonmotors.com/releases/2023/04/230411150526.htm Researchers develop a computational model of stormwater piping to study storm geysers. They used this model to understand why storm geysers form, what conditions tend to make them worse, and what city planners can do to prevent them from occurring. The authors say the best cure for a storm geyser is bigger pipes; however, that advice is little help to cities with existing pipeline infrastructure. In these systems, the focus must be on minimizing the potential damage by reducing the height of the geysers, the volume of expelled water, or the resulting damage to the pipeline. Tue, 11 Apr 2023 15:05:26 EDT //www.koonmotors.com/releases/2023/04/230411150526.htm //www.koonmotors.com/releases/2023/04/230411105925.htm The amount of dissolved oxygen in a river is a matter of life or death for the plants and animals living within it, but this oxygen concentration varies drastically from one river to another, depending on their unique temperature, light and flow. To better understand which factor has the greatest impact on the concentration of dissolved oxygen, researchers used a deep learning model to analyze data from hundreds of rivers across the United States. Tue, 11 Apr 2023 10:59:25 EDT //www.koonmotors.com/releases/2023/04/230411105925.htm //www.koonmotors.com/releases/2023/04/230410111700.htm A new study shows that if U.S. nuclear power plants are retired, the burning of coal, oil, and natural gas to fill the energy gap could cause more than 5,000 premature deaths. Mon, 10 Apr 2023 11:17:00 EDT //www.koonmotors.com/releases/2023/04/230410111700.htm //www.koonmotors.com/releases/2023/04/230407133443.htm Human activities emit many kinds of pollutants into the air, and without a molecule called hydroxide (OH), many of these pollutants would keep aggregating in the atmosphere. Fri, 07 Apr 2023 13:34:43 EDT //www.koonmotors.com/releases/2023/04/230407133443.htm //www.koonmotors.com/releases/2023/04/230405214852.htm Exposure to fine particulate air pollutants (PM2.5) may increase the risk of developing dementia, according to a new meta-analysis. Wed, 05 Apr 2023 21:48:52 EDT //www.koonmotors.com/releases/2023/04/230405214852.htm //www.koonmotors.com/releases/2023/04/230404114255.htm A research team has demonstrated a unique method that reduces the aerodynamic resistance of ships by 7.5 per cent. This opens the way for large cargo ships borne across the oceans by wind alone, as wind-powered ships are more affected by aerodynamic drag than fossil-fueled ones. Tue, 04 Apr 2023 11:42:55 EDT //www.koonmotors.com/releases/2023/04/230404114255.htm //www.koonmotors.com/releases/2023/03/230331131514.htm 工程研究人员已经开发出一种新颖的方法to capture carbon dioxide from the air and store it in the 'infinite sink' of the ocean. The approach uses an innovative copper-containing polymeric filter and essentially converts CO2 into sodium bicarbonate (aka baking soda) that can be released harmlessly into the ocean. This new hybrid material, or filter, is called DeCarbonHIX (i.e., decarbonization through hybrid ion exchange material). The research has demonstrated a 300 percent increase in the amount of carbon captured compared with existing direct air capture methods. Fri, 31 Mar 2023 13:15:14 EDT //www.koonmotors.com/releases/2023/03/230331131514.htm //www.koonmotors.com/releases/2023/03/230328145423.htm Researchers have developed a practical way to produce green hydrogen using sustainable catalysts and say their work is a major step towards production simpler, more affordable and more scalable. Tue, 28 Mar 2023 14:54:23 EDT //www.koonmotors.com/releases/2023/03/230328145423.htm //www.koonmotors.com/releases/2023/03/230328145200.htm New research has shown that bursting bubbles coated by a thin oil layer produce drops with smaller sizes, greater overall number of drops, and are ejected at a higher velocity, compared to bubbles generated in clean water. Tue, 28 Mar 2023 14:52:00 EDT //www.koonmotors.com/releases/2023/03/230328145200.htm //www.koonmotors.com/releases/2023/03/230327163212.htm A new study using simulations identified two tipping points for the Greenland Ice Sheet: releasing 1000 gigatons of carbon into the atmosphere will cause the southern portion of the ice sheet to melt; about 2500 gigatons of carbon means permanent loss of nearly the entire ice sheet. Having emitted about 500 gigatons of carbon, we're about halfway to the first tipping point. Mon, 27 Mar 2023 16:32:12 EDT //www.koonmotors.com/releases/2023/03/230327163212.htm