Why are people concerned about the sustainability of fossil fuels?

Fossil fuels are considered non-renewable resources and consist of coal, oil, and natural gas. They release carbon dioxide, a potent greenhouse gas, into the atmosphere when burned. Greenhouse gases trap heat from the sun in the Earth's atmosphere, causing temperatures to rise. The people of today are taking more more concerned as they are more educated about the underside effects of burning fossil fuels such as air pollution

the decreasing neutrality of the u. s. in world war i

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it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

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