Human activities around the world are producing increasingly large quantities of greenhouse gases, particularly carbon dioxide (CO2) resulting from the consumption of fossil fuels and deforestation. Most experts expect that the accumulation of such gases in the atmosphere will result in a variety of environmental changes over time, including a gradual warming of the global climate, extensive ch...

One of the major factors, contributing to the emission of greenhouse gases in the environment is generation of pollutant gases in municipal landfills. As for the design and building of a gas collecting system, it is necessary to properly estimate the amount and type of the landfill emissions. By means of LandGEM model, this study predicts the amount and type of the landfill gases, produced for ...

We demonstrate compact, low power, lightweight laser-based sensors for measuring trace gas species in the atmosphere designed specifically for electronic unmanned aerial vehicle (UAV) platforms. The sensors utilize non-intrusive optical sensing techniques to measure atmospheric greenhouse gas concentrations with unprecedented vertical and horizontal resolution (~1 m) within the planetary bounda...

Methane is one of the most serious greenhouse gases contributing to irreversible climate change. The contribution of methane emissions from leaking pipelines and the expected increased throughput through the pipelines prompted the natural gas industry to set a goal of reducing emissions by 50% by 2010. The integrity of the pipelines is critical to the safety of the gas transportation infrastruc...

Rubisco I's specificity, which today may be almost perfectly tuned to the task of cultivating the global garden, controlled the balance of carbon gases and O(2) in the Precambrian ocean and hence, by equilibration, in the air. Control of CO(2) and O(2) by rubisco I, coupled with CH(4) from methanogens, has for the past 2.9 Ga directed the global greenhouse warming, which maintains liquid oceans...

The MIT Emissions Prediction and Policy Analysis (EPPA) model is applied to an exploration of the national emissions obligations that would be required to stabilize atmospheric CO2 concentrations at levels now under active discussion. The results indicate that the needed voluntary participation will be difficult to achieve, not least because nations at very different income levels would have to...

Executive summary This report estimates greenhouse gas emissions in tons of carbon dioxide equivalent (CO2e) for fleet vehicles, street lights, and traffic signals operated by the Town of Chapel Hill from 2005 to 2008, and makes policy recommendations for the future reduction of such emissions. The authors are undergraduates studying at the University of North Carolina at Chapel Hill, who have ...

Global gas flaring is difficult to sense, a tremendous source of wasted revenue, and causes ecological problems. We use satellite sensors to predict gas flares’ sizes. We tested regression and classification algorithms, along with anomaly detection using k-means, and found that linear regression and 2-class SVM are almost as good as the full-tilt sensor model produced by the National Oceanic At...

All renewable energy systems make some contribution to climate change. This is due to the emission of greenhouse gases from the fossil fuels combusted for their construction, and as back-up energy during their operation. Accurate calculation of greenhouse gas emissions per kilowatt hour of electricity is difficult, but is an important part of policy making and planning. Calculation methodologie...

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