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Solar energy is a very useful resource. Today 80% of the energy we use comes from fossil fuels and about 1% comes from solar energy. Fossil fuels are .........non-renewable........, that means that they are......used up.......faster than they could be .....replaced....Also, fossil fuels are limited and cause pollution. They are the primary cause for.....air pollution....that causes acid rain and .....global warming...... The good thing about solar energy is that it is.........renewable........because it is always replaced. Also, solar energy does not pollute the environment. There are four ways to use solar energy: passive solar heating system, active solar heating system, solar thermal power plants, and solar cells
1: heavier-than-air
2: affordable
3: innovations
4: came up with
5: first scheduled air