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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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.
Because the kilowatt-hours used by cars ultimately come from some carbon-based source (power plant or otherwise), the calculation converts kilowatt-hours to equivalent gallons of gasoline consumed.
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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.
There could also be good news for transport, the next biggest source of carbon emissions.
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Gov. Rick Perry recently quipped that the largest source of carbon dioxide is Al Gore's mouth.
But corn kernels are a cheap and eco-friendly source of sugar--which is also a source of carbon.
The Environmental Protection Agency used its authority to regulate carbon dioxide as a source of pollution and set higher standards for power plants.
Tropical fires are, nevertheless, a significant source of carbon dioxide.
But should he proceed with regulations to control pollution from existing coal-fired power plants, the single largest source of carbon pollution, those regulations probably will contribute to shuttering facilities already struggling to compete with cheap natural gas.
Mr McPoland said it was too soon to determine the source of the carbon monoxide.
Making PLA from petrochemicals, the leading source of the carbon that lies at the heart of plastic's makeup, is too costly and complicated.
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.
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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That's where Denbury owns the Jackson Dome, an extinct volcano that contains the biggest source of naturally occurring carbon dioxide on the Gulf Coast.
Nevertheless, many environmentalists fiercely resist any moves to ease arbitrary, prohibitive barriers to the construction of the best non-carbon-dioxide-producing energy source of all: nuclear power plants.
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.
All that's needed, apparently, is an energy source, some sort of carbon-based material and a bit of water.
Black carbon is said to be a significant source of rapid warming in the northern United States, Canada, northern Europe and northern Asia.
The most obvious source of extra cash is the carbon market, or preferably a carbon tax.
It is a source of base load, low-carbon and largely fixed-cost power for many utilities.
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It focuses on the biggest human source of greenhouse gases - emissions of carbon dioxide, or CO2, from power plants.
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.
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.
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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Unless the overall Senate bill includes a cap on stationary source emissions, some energy bill provisions would actually make carbon emissions worse.
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