By comparing reconstructions of atmospheric CO2 concentrations and sea level over the past 40 million years, researchers based at the National Oceanography Centre, Southampton have found that greenhouse gas concentrations similar to the present (almost 400 parts per million) were systematically associated with sea levels at least nine metres above current levels.
The new study, published today in the journal Nature, examined the probability of keeping average global temperatures from rising more than 2°C above preindustrial levels under varying levels of climate policy stringency, and thus mitigation costs. In addition, the study for the first time quantified and ranked the uncertainties associated with efforts to mitigate climate change, including questions about the climate itself, uncertainties related to future technologies and energy demand, and political uncertainties as to when action will be taken.
Amid growing concern over the surprisingly large amount of greenhouse gas produced by the Internet and other telecommunications activities, researchers are reporting new models of emissions and energy consumption that could help reduce their carbon footprint. Their report appears in ACS' journal Environmental Science & Technology.
SCS Global Services (SCS) has verified the carbon footprint of Delta Air Lines, making it the world's first legacy airline to achieve a successful, independent third party verification of its greenhouse gas emissions inventory. SCS confirmed Delta's conformance with The Climate Registry's General Reporting Protocol, one of the world's most trusted methodologies for measuring greenhouse gas (GHG) emissions.
In a discovery that raises further concerns about the future contribution of Antarctica to sea level rise, a new study finds that the western part of the ice sheet is experiencing nearly twice as much warming as previously thought.
With the advent of the "shale gas revolution," the United States has undergone a full-scale natural gas boom. Driven by fracking and horizontal drilling, the United States will likely overtake Russia as the world's largest producer of natural gas by 2015, according to the International Energy Agency.
The latest episode in the American Chemical Society's (ACS') award-winning Global Challenges/Chemistry Solutions podcast series reports that putting a speed limit on cargo ships as they sail near ports and coastlines could cut their emission of air pollutants by up to 70 percent, reducing the impact of marine shipping on Earth's climate and human health.
Ocean iron fertilisation is a process that attempts to encourage phytoplankton growth in regions with unused nutrients and stores carbon away from the atmosphere.
The United States could eliminate the need for crude oil by using a combination of coal, natural gas and non-food crops to make synthetic fuel, a team of Princeton researchers has found.
The Ecosystem Services Unit of Winrock International (WI) and Woods Hole Research Center (WHRC) today announced they have reached scientific consensus on gross carbon dioxide (CO2) emissions from tropical deforestation. The analysis provides a crucial piece of information that now allows policymakers to confidently set targets for emissions reductions based on scientifically derived benchmarks.
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