More than three billion people are at risk from indoor air pollution because of the heating or cooking fuels they use.

VOA: special.2010.02.01

Older equipment powered by fossil fuels should be inspected every year to make sure it continues to be safe.

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

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

VOA: special.2010.02.02

The goal of the Global Alliance for Clean Cookstoves is one hundred million homes using safer cookstoves and fuels by twenty twenty.

VOA: special.2010.09.27

They hope that future synthetic cells can make useful bacteria for products like bio-fuels or vaccines, and to clean up polluted water.

VOA: special.2010.07.20

Automobiles create it. Any device that burns fuels like coal,gasoline,kerosene, oil or wood will produce carbon monoxide.

VOA: special.2010.02.02

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

VOA: special.2009.10.23

He notes a World Health Organization estimate that more than one and a half million people a year die from breathing smoke from solid fuels.

VOA: special.2010.02.01

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

VOA: special.2009.04.14

Any device that burns fuels such as coal,oil or wood can create the gas.

VOA: special.2010.02.02

They use biomass fuels like wood,crop waste, animal waste or coal.

VOA: special.2010.02.01

Burning fuels like oil and coal is a major cause.

VOA: special.2010.01.19

These solid fuels may be the least costly fuels available.

VOA: special.2010.02.01

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

Coal fuels 70 percent of China's energy consumption, making the country the largest consumer and producer of coal in the world.

VOA: standard.2010.08.03

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

Vichai also warns that increasing demand for bio-fuels from grain could reduce food crops, forcing the price of food grains higher.

VOA: standard.2009.12.17

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

VOA: standard.2009.04.15

They say watching the World Cup only fuels their enthusiasm, helping to build a bright future for youth football in the United States.

VOA: standard.2010.06.15

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

He notes that broad policy changes that reduce reliance on fuels like coal and wood are being implemented and are beginning to have a positive impact on life expectancy.

VOA: standard.2010.04.07

Our insatiable demand for illegal drugs fuels the drug trade.

VOA: standard.2009.03.25

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