task 1
1 The difference between them fossil fuels were produced millions of years ago when plants and other organisms died and buried.
2 Biofuels are produced from biological material that has been living recently.
task 2
1 false
2 true
3 false
4 false
5 doesn't say
task 3
1 impact
2 waste
3 fossil
4 variety
5 liquid
6 lightning
