Greenhouse gas emissions

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According to Wikipedia(2015), greenhouse gases is referred to gases in an atmosphere that absorb and emit radiation within the thermal infrared range. Greenhouse gases commonly consist of Carbon dioxide(CO2),Methane(CH4), Nitrous oxide(N2O),Chlorofluorocarbons(CFCs). The excessive emission of greenhouse gases bring a series of problems, including air pollution, climate change greenhouse effects and sea level raised.

Human activities are responsible for almost all of the increase in greenhouse gases in the atmosphere over the last 150 years(ICCP,2007). These activities include burning fossil fuels for electricity, heat, and transportation. The following pie chart shows greenhouse gas emissions created by different sector in USA in 2013. Electricity production generated the largest share(31%) of greenhouse gas emissions, followed by transportation(27%) and industry(21%). It is similar to other developed countries.

source:http://www.epa.gov/climatechange/ghgemissions/sources.html

Total U.S. Greenhouse Gas Emissions by Economic Sector in 2013

Several processes can be applied to remove greenhouse gases. With natural processes, it can be a physical change, a chemical reaction within the atmosphere or a physical exchange between the atmosphere and the other compartments of the planet. Technology development, energy conservation and emissions reduction are ideal concepts to deal with it.

References:

EPA 2015,

Sources of Greenhouse Gas Emissions,accessed 27 April 2015,<http://www.epa.gov/climatechange/ghgemissions/sources.html>

IPCC 2007, Summary for Policymakers. In: Climate Change 2007,The Physical Science, Basi

Wikipedia 2015,  Greenhouse gas, accessed 27 April 2015,<http://en.wikipedia.org/wiki/Greenhouse_gas>