2. Read the article. Complete the sentences with the words from the article.
1. Alternative energy sources are not the result of … of fossil fuels.
2. … fuels make use of daily waste products.
3. Besides generating electricity, geothermal energy also … homes.
4. … contain both thermal energy and mechanical energy.
Bài Làm:
1. burning |
2. Biomass |
3. heats |
4. Oceans |