Question

why is why there is global concern on fossil fuel

Answer 1

There is a global concern on fossil fuels because they are non renewable resources and can't be replinished by nature that is why we are also searching for a alternative of fuel

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Answer 2

While CO2 is a natural greenhouse gas, too much of it in the atmosphere has been proven to cause global warming. ... The solution to the problems of limited fossil fuels and their impact on the environment is to have renewable resources play a larger role in the supply of energy.