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We investigate the probabilities of triggering climate tipping points under five Shared Socioeconomic Pathways (SSPs) and how they are altered by including the additional carbon emissions that could arise from tipping points within the Earth's carbon cycle. The crossing of a climate tipping point at a threshold level of global mean surface temperature (threshold temperature) would commit the affected subsystem of the Earth to abrupt and largely irreversible changes with negative impacts on human well-being. However, it remains unclear which tipping points would be triggered under the different SSPs due to uncertainties in the climate sensitivity to anthropogenic greenhouse gas emissions, the threshold temperatures and timescales of climate tipping points, and the response of tipping points within the Earth's carbon cycle to global warming. We include those uncertainties in our analysis to derive probabilities of triggering for 16 previously identified climate tipping points within the Earth system.

Eat-Lancet report recommended shift to more plant-based, climate-friendly diet but was extensively attacked online [...] The report recommended that if global red meat eating was cut by 50%, the “planetary health diet” would provide nutritious food to all while tackling the harms caused by animal agriculture, which accounts for over 14% of all greenhouse gas emissions worldwide. It suggested individuals – particularly in wealthy countries – should increase their consumption of nuts, pulses and other plant-based foods while cutting meat and sugar from their diets.

Climate experts expressed shock and dismay at the move. “It would be a bit like unplugging the equipment that monitors the vital signs of a patient that is critically ill,” one said.

Countries must move rapidly to slash CO2 emissions from homes, offices, shops and other buildings—a sector that accounts for a third of global greenhouse gas pollution, the United Nations said Monday. Carbon dioxide emissions from the building sector rose around 5% in the last decade when they should have fallen 28%, according to a new report by the United Nations Environment Program (UNEP).

Donald Trump’s administration is to reconsider the official finding that greenhouse gases are harmful to public health, a move that threatens to rip apart the foundation of the US’s climate laws, amid a stunning barrage of actions to weaken or repeal a host of pollution limits upon power plants, cars and waterways.

Under current emission trajectories, temporarily overshooting the Paris global warming limit of 1.5 °C is a distinct possibility. Permanently exceeding this limit would substantially increase the probability of triggering climate tipping elements. Here, we investigate the tipping risks associated with several policy-relevant future emission scenarios, using a stylised Earth system model of four interconnected climate tipping elements.

World Meteorological Organization sees ‘no end in sight to the rising trend’, largely driven by fossil fuel burning

When attempting to quantify future harms caused by carbon emissions and to set appropriate energy policies, it has been argued that the most important metric is the number of human deaths caused by climate change. Several studies have attempted to overcome the uncertainties associated with such forecasting. In this article, approaches to estimating future human death tolls from climate change relevant at any scale or location are compared and synthesized, and implications for energy policy are considered. Several studies are consistent with the “1000-ton rule,” according to which a future person is killed every time 1000 tons of fossil carbon are burned (order-of-magnitude estimate). If warming reaches or exceeds 2 °C this century, mainly richer humans will be responsible for killing roughly 1 billion mainly poorer humans through anthropogenic global warming, which is comparable with involuntary or negligent manslaughter. On this basis, relatively aggressive energy policies are summarized that would enable im

Top oil and gas companies have made little progress in turning away from hydrocarbons and towards the goals of the 2015 Paris climate deal, multinational nonprofit platform CDP said on Thursday.

The total concentration of greenhouse gases and other forcing agents, including cooling aerosols, reached 465 parts per million CO2 equivalents in 2020. This is around the peak level that the International Panel on Climate Change states 'should not be exceeded if — with a 67% likelihood and not allowing a temperature overshoot — the global temperature increase is to be limited to 1.5oC above pre-industrial levels'. When allowing for a temperature overshoot, the peak level could be exceeded in 2024. The peak concentrations corresponding to a temperature increase of 2oC by 2100 could be exceeded between 2027 and 2030.

Vast releases of gas, along with future ‘methane bombs’, represent huge threat – but curbing emissions would rapidly reduce global heating

Electric utilities are likely responsible for the nation’s higher than expected emissions of sulfur hexafluoride, a greenhouse gas 25,000 times worse for the climate than carbon dioxide.

Vast carbon store may be close to point where it could flip from absorbing CO2 to releasing it, research shows. The Congo peatlands are a huge carbon “timebomb” that could be triggered by the climate crisis, research has shown.

Many countries' pledges to get to net zero greenhouse gas emissions rely partly on removing carbon dioxide from the atmosphere, using methods such as planting trees and restoring degraded ecosystems. But a report out today has revealed they are relying too heavily on these carbon drawdown schemes to fulfil these promises. The Land Gap Report, which was released today by the University of Melbourne and includes input from more than 20 international researchers, has calculated countries would collectively need 1.2 billion hectares of land to meet their Paris Agreement goals.

Scientists warn world ‘is heading in wrong direction’ amid rise in nitrous oxide, carbon dioxide and methane.Atmospheric levels of all three greenhouse gases have reached record highs, according to a study by the World Meteorological Organization, which scientists say means the world is “heading in the wrong direction”.

The EU is on track to break a promise to cut methane emissions by 30% by 2030 made due to a “policy vacuum” on livestock emissions, a report has warned.Most of Europe’s methane emissions come from agriculture – particularly livestock – but the EU has avoided using policy levers such as its €387bn common agricultural policy to directly tackle the problem

WMO records biggest increase in methane concentrations since start of measurements

Levels of the gas are growing at a record rate and natural sources like wetlands are the cause, but scientists don’t know how to curb it.

Greenhouse gas has undergone rapid acceleration and scientists say it may be due to atmospheric changes

The EPA ruling means it may now be mathematically impossible through available avenues for the US to achieve its greenhouse gas emissions goal

Climate-changing pollution reaches record levels, driving unprecedented heating

When people talk about ways to slow climate change, they often mention trees, and for good reason. Forests take up a large amount of the planet-warming carbon dioxide that people put into the atmosphere when they burn fossil fuels. But will trees keep up that pace as global temperatures rise? With companies increasingly investing in forests as offsets, saying it cancels out their continuing greenhouse gas emissions, that’s a multibillion-dollar question.

En février 2022, la revue Plos Climate, spécialisée dans les questions relatives au changement climatique, a fait paraître en accès libre un article au titre évocateur : Rapid global phaseout of animal agriculture has the potential to stabilize greenhouse gas levels for 30 years and offset 68 percent of CO2 emissions this century (L’arrêt rapide de l’élevage à l’échelle mondiale pourrait stabiliser les niveaux de gaz à effet de serre pendant 30 ans et compenser 68 % des émissions de CO2 de ce siècle).

Water vapor is Earth’s most abundant greenhouse gas. It’s responsible for about half of Earth’s greenhouse effect — the process that occurs when gases in Earth’s atmosphere trap the Sun’s heat. Greenhouse gases keep our planet livable. Without them, Earth’s surface temperature would be about 59 degrees Fahrenheit (33 degrees Celsius) colder. Water vapor is also a key part of Earth’s water cycle: the path that all water follows as it moves around Earth’s atmosphere, land, and ocean as liquid water, solid ice, and gaseous water vapor.

Oil companies love to tell the world about the super cool technologies that have that will allow us to keep burning fossil fuels without cooking the climate. But those technologies are largely bullshit.

Malaysia’s latest catalogue of its greenhouse gas emissions to the United Nations reads like a report from a parallel universe. The 285-page document suggests that Malaysia’s trees are absorbing carbon four times faster than similar forests in neighboring Indonesia.

Low greenhouse gas technologies require more metals than their fossil fuel-based counterparts. This column estimates supply elasticities and pins down the price impact of the energy transition on the metals markets. The results show that prices for copper, nickel, cobalt, and lithium could reach historical peaks for an unprecedented, sustained period in a net zero emissions scenario. The total value of production could rise more than four-fold for the period 2021-2040, rivaling the total value of crude oil production.

Scientists have warned that hydrogen could be a significant “indirect” contributor to the greenhouse effect when it leaks through infrastructure and interacts with methane in the atmosphere.

Twenty livestock companies are responsible for more greenhouse gas emissions than either Germany, Britain or France – and are receiving billions of dollars in financial backing to do so, according to a new report by environmental campaigners. Raising livestock contributes significantly to carbon emissions, with animal agriculture accounting for 14.5% of the world’s greenhouse gas emissions.

one-third of all food produced each year is squandered or spoiled before it can be consumed. Research also suggests that high-income countries waste as much food as sub-Saharan Africa produces. This food waste then ends up in landfills to rot – which releases greenhouse gases. And when this is combined with the amount of energy it takes to produce, manufacture, transport and store this food, it contributes a staggering 3 billion tonnes of carbon dioxide to our planet.

Increase means country will slip back from goal of cutting emissions by 40% from 1990 levels

Global greenhouse gas emissions must peak in the next four years, coal and gas-fired power plants must close in the next decade and lifestyle and behavioural changes will be needed to avoid climate breakdown, according to the leaked draft of a report from the world’s leading authority on climate science.

The climate crisis is accelerating at unprecedented pace, according to a new United Nations state-of-the-science report. It is "a code red for humanity," said UN Secretary-General António Guterres — and given that the report concludes the entirety of the warming is due to human greenhouse gas emissions, avoiding the worst of its consequences is up to us.

The European Commission just released on Friday 16 July its new EU Forest Strategy. This Strategy supplements the Fit for 55 Package (published on 14 of July) and will contribute to achieve the EU’s target of reducing greenhouse gas emissions from 55% by 2030, as set out in the European legislation on Climate. This new ambitious strategy “recognises the central and multi-functional role of forests, and the contribution of foresters and the entire forest-based value chain for achieving by 2050 a sustainable and climate-neutral economy

Which effects did the heat wave of summer 2020 have in Siberia? geologists compared the spatial and temporal distribution of methane concentrations in the air of northern Siberia with geological maps. the methane concentrations in the air after last year’s heat wave indicate that increased gas emissions came from limestone formations.

The lifestyles of around three average Americans will create enough planet-heating emissions to kill one person, and the emissions from a single coal-fired power plant are likely to result in more than 900 deaths, according to the first analysis to calculate the mortal cost of carbon emissions.

The Bootleg Fire is raging through a project in southern Oregon, where 400,000 acres of forest owned by Green Diamond Resource Co. are being preserved to compensate for greenhouse gas emissions elsewhere. Microsoft in February paid Green Diamond to offset a quarter million tons of the tech giant’s 2021 carbon emissions.Two other wildfires are active within a Colville Indian Reservation carbon project in eastern Washington.

Plug gaps to measure ozone-destroying chemicals and greenhouse gases and verify compliance with Paris and Montreal treaties.

the sediments below oxygen-depleted waters are a significant source of nitrous oxide (N2O). This gas is released into the atmosphere when deep water rises to the surface in a process known as upwelling. Nitrous oxide, more commonly known as “laughing gas,” is a potent greenhouse gas, 300 times more powerful than carbon dioxide. Global emissions of N2O are increasing as a result of human activities that stimulate its production.

The potent greenhouse gas methane is spewing out of natural gas infrastructure across the European Union because of leaks and venting. Using an infrared camera, non-profit Clean Air Task Force (CATF) found methane seeping into the atmosphere at 123 oil and gas sites in several countries this year. Methane, the biggest cause of climate change after carbon dioxide (CO2), is the main component of natural gas and over 80 times more potent than CO2 in its first 20 years in the air.