In 2005, severe drought in the Amazon region saw widespread wildfires that turned the rainforest into a carbon source.
Some applaud it as a lower-carbon source of electricity.
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This would include advanced land use management strategies to protect or enhance land carbon sinks, and the use of biomass for both carbon sequestration (including biochar) and as a carbon neutral energy source.
But corn kernels are a cheap and eco-friendly source of sugar--which is also a source of carbon.
Tropical fires are, nevertheless, a significant source of carbon dioxide.
The Environmental Protection Agency used its authority to regulate carbon dioxide as a source of pollution and set higher standards for power plants.
Nukes may not be quite as clean as wind, solar or geothermal, but they provide a carbon-free and domestic source of energy that produces lots of jobs.
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All life as we know it on Earth trades off a source of complex carbon molecules, such as amino acids - just as it needs water and energy.
Second, governments should not pick winners or give out extensive subsidies. (Translation: Ethanol is a bad idea, and other existing "renewables, " such as wind power, are unlikely to ever be more than a niche source.) Better to have a small carbon tax to place a price floor for competing technologies, and offer large cash prizes, similar to the X-Prize for private space flight, for specified energy breakthroughs.
It is a source of low-carbon energy and can contribute to the UK's energy mix and security of supply longer-term.
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The switch to Sunoco Green E15, the official fuel of NASCAR and a renewable, low-carbon power source, reduced greenhouse gas emissions by 20% compared with unleaded gas.
Impressed by arguments that nuclear energy is a proven source of low-carbon power, and worried about the dependence on foreign fossil fuels caused by the decline of North Sea oil and gas, the government has been preparing the ground for a nuclear revival.
Black carbon is said to be a significant source of rapid warming in the northern United States, Canada, northern Europe and northern Asia.
It is a source of base load, low-carbon and largely fixed-cost power for many utilities.
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In September, the EPA put forth a new Mandatory Emissions Reporting Rule that will require all facilities that directly emit or supply products or fuels that discharge more than 25, 000 metric tons of carbon dioxide a year to report those emissions by volume and source annually, effective January 2010.
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If you oxidize any hydrocarbon, you generally produce heat, carbon dioxide, and water vapor, assuming a relatively pure fuel source.
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All that's needed, apparently, is an energy source, some sort of carbon-based material and a bit of water.
But all nations are trying to reduce their carbon footprints while at the same time working to construct a reliable energy source.
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Many venture capitalists and investment bankers see a carbon-trading regime and massive subsidies for renewable energy as a potential source of windfall profits.
The most obvious source of extra cash is the carbon market, or preferably a carbon tax.
Unless the overall Senate bill includes a cap on stationary source emissions, some energy bill provisions would actually make carbon emissions worse.
At the annual meeting of the Carbon Disclosure Project--a non-profit investor organization devoted to greater transparency in greenhouse gas emission statistics--Sun released a set of open-source software tools that companies can use to track carbon emissions.
And conservative America, once solidly sceptical, is now split over the issue, as Christians concerned about mankind's stewardship of the Earth, neo-cons keen to reduce America's dependency on the Middle East and farmers who see alternative energy as a new potential source of energy come round to the idea of cutting down on carbon.
Not everyone is convinced that wind-power is the most reliant route to clean, renewable carbon-free energy, and it is concerning that Britain is relying on a power source that must be backed up by more constant technologies such as nuclear, coal, or gas, because the wind blows inconsistently, as is its nature.
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