9 questions
1. Fossil fuels used to make ______
2. _________ mined for steel
3. _________ used to produce rayon.
4. Materials are ___________ to increase strengthen.
5. Average tyre used for _____ then disposed of.
6. landfill = least attractive environmental _________
7. Incineration = recovers lơ percentage of _________
8. Retreading = environmental benefits may be ______
9. ________ = best choice