What is the concern for fossil fuels?

Answer 1

1. Burning fossil fuels releases long-held carbon that had been hidden for millions of years.
2. This extra carbon dioxide is a greenhouse gas that is too much for the greenhouse effect and the carbon cycle to deal with.
3. The greenhouse effect becomes the runaway greenhouse effect.
4. This causes global warming.

A:

1. They're non-renewable resources - means one day they will all be used up.
2. The biggest supply is owned by a small number of nations, which means that there is a lot of politics involved.

Answer 2

Makes pollution, such as acid rain, greenhouse gasses, carbon dioxide, carbon monoxide.

Finite energy source, eventually will run out or will be so scarce that it will be too expensive to get the rest.

Not a renewable energy source.

Contributes to global warming.

Damage to environment during extraction and transportation, such as strip mining and oil leaks.

Harm to endangered species by destruction of habitat.