Experts agree that the leading cause of carbon monoxide poisoning is damaged equipment that burns these fossil fuels.

VOA: special.2010.02.02

Natural gas is considered the cleanest of the fossil fuels, the fuels created by plant and animal remains over millions of years.

VOA: special.2009.10.23

The gas is mainly methane. It produces half the carbon dioxide of other fossil fuels.

VOA: special.2009.10.23

Students grow organic food and use as little fossil fuels and chemicals as possible.

VOA: special.2009.04.14

Senator Lamar Alexander said the country should build 100 nuclear power plants, to help break its reliance on fossil fuels.

VOA: standard.2009.04.25

The disaster comes as Obama administration attempts to chart a course toward U.S.energy independence and less reliance on fossil fuels.

VOA: standard.2010.05.02

Does measures seem to low emissions of greenhouse gases by raising the cost of gasoline, coal,natural gas and other fossil fuels.

VOA: standard.2009.12.12

The gathering is also expected to address environmental challenges and the need to develop alternatives to fossil fuels.

VOA: standard.2009.04.15

Most of these substances directly result from the industrial, urban and vehicular combustion of fossil fuels.

VOA: standard.2009.03.23

Most scientists believe the warming trend is mainly caused by human activity, especially the use of fossil fuels and the cutting down of forests.

VOA: standard.2009.12.09

Beijing has refused to agree to cap its overall growth in its consumption of fossil fuels or reduce its emissions of carbon dioxide and other greenhouse gases.

VOA: standard.2010.08.03

The bill's sponsors say that by putting a price on carbon released into the atmosphere, the measure would help reduce America's reliance on fossil fuels and cut its greenhouse gas emissions.

VOA: standard.2010.06.14

"The cost of solar has been dropping on average about 30 percent a year, where the cost of traditional energies has been going up exponentially because the price of fossil fuels is going up,".

VOA: standard.2009.10.27

Most of the data comes from the industrialized world. Not surprisingly, burning fossil fuels for transportation and electrical generation top the list for their contributions to climate change, acid rain and toxic pollution.

VOA: standard.2010.06.04

"What we've got to do is to make sure that in the year 2041 that we are not stupid enough as a world to go to Antarctica, which is not owned by anybody, and exploit it for fossil fuels."

VOA: standard.2009.12.10

"Development is a right and that should continue but that perhaps paths where there could be a reconciliation of the objective of poverty reduction, enhanced standards of living, a life of greater dignity in developing countries can be reconciled with climate objectives by shifting the sources of energy away from the fossil fuels to the cleaner and lower carbon emissions.

VOA: standard.2009.09.01