combustion

1 - Researchers studied the environmental impact of the combustion of many fuel blends containing waste plastics and conventional combustibles like coal and lignite etc.

2 - Steel, which is basically iron mixed with carbon, depends on combustion at several points in its manufacture.

3 - The combustion of fossil fuels increases the concentration in the atmosphere of certain greenhouse gases.

4 - Combustion of fossil fuels and use of fertilizer are the main sources of the increasing amount of nitrogen in the atmosphere.

5 - A significant outcome of air pollution is the high cost of pollution cleanup and prevention, an example of which is the global effort to control emissions of CO2, a gas produced from the combustion of fossil fuels such as coal or oil, or of other organic materials like wood.