Greenhouse gases importance

Another important greenhouse gas is a product of phytoplankton oxidation of ammonium. This reaction can follow two pathways ... 

The conventional fuels used for transit applications include gasoline, diesel fuel, and electricity. Alternatives to these fuels have been sought to reduce energy consumption, pollutant emissions, greenhouse gas emissions, and use of imported fuels. The conventional fuels for internal-combustion engines are the most energy-dense fuels petroleum and diesel fuel. 

Concerns over atmospheric methane as a greenhouse gas and the large contribution of biomethanogenesis as a source of this gas make it important to determine the relative significance of various components of this activity. A recent paper (8) summarized estimates (28-30) of source fluxes of atmospheric methane based on several carbon isotopic studies and presented new data on natural sources and biomass burning. These data (Table III) show that of a total flux of 594 million tons (Tg) per year, 83% is produced via biomethanogenesis from a combination of natural (42%) and anthropogenic (41%) sources. 

We can see the importance of water vapor as a greenhouse gas by comparing the greenhouse effect on Earth, a relatively humid planet, with... 

Methane (CH4), the Earth s third most important greenhouse gas (behind water vapor and CO2) is produced almost exclusively by terrestrial sources (see Chapters 7 and 11). Natural methane sources include anaerobic microbial... 

Mankind s impact on the global climate and whether pollution from modern energy use is indeed warming the Earth have become important issues for national and international policy makers. Political pressure and public sentiment are based on complex data sets that, alone, cannot tell the whole story. The ultimate question is whether our climate is becoming warmer because of the slow build-up in atmospheric greenhouse gas concentrations (1). The answer is not clear, because much of what we know about global climate change is inferred from historical evidence of uncertain quality. 

Even in the absence of formal binding international implementation mechanisms for the Kyoto accord, we are seeing many businesses begin to factor greenhouse gas emission considerations into their business plans. It has simply become a good business decision and it serves customer demand. This is a profoundly important development, and nuclear power is uniquely positioned to play in this game. 

Of these, climate change has the potential to become by far the most important. If taken seriously by politicians (which is not the case in a number of countries), this could require eventual stabilisation of greenhouse gas concentration in the atmosphere (usually expressed in terms of ppm CO2 equivalent) if the environmental impact is to be controlled. Should such a stabilisation target be set at double the C02 content at the start of the industrial revolution and this to be reached by 2050, calculations show that fossil foel may by then have to be limited to around 25% of energy demand, compared to some 82% today. 

Abstract The market of Diesel vehicles in Western Europe is, presently, still growing. In Asia, this market is still in an embryonic state (but should result as gigantic), while tomorrow the USA could become The Market . Diesel technology is an important issue for the carmakers, because it emits noticeably less Greenhouse gas than its gasoline counterpart. 

Over the last centuries, climate change has been raised as a very important issue all over the world. The change in climate results from an increase in the earth s average atmospheric temperature, which is usually referred to as global warming. It may be due to both natural and human causes, especially greenhouse gas (GHG) emissions. 

Conrad R, Erkel C, Liesack W. Rice cluster I methanogens, an important group of Archaea producing greenhouse gas in soil. Curr. Opin. Biotech. 2006 17 262-267. 

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