GIÚP MÌNH VỚI~~~PLS Ex 3. Fill in the blank with one suitable word from the box: hydro, heat, abundant, freely, renewable, friendly, turbines, solar, available, generate 1. How much power output will the new wind __________ increase? 2. Batteries of solar energy are eco- ________ products. 3. Renewable energy sources are favoured because they are ________. 4. In this area natural gas is not always ________. 5. ________ power is generated from the energy of fast running water. 6. Solar energy is ________, and solar power can be used to generate electricity. 7. My family will be receiving ________ panels for home tomorrow morning. 8. Fossil fuel burning produces ________ and carbon dioxide.