Bài 17 :
1 Rewrite the sentences without changing their meanings.
(Viết lại câu sao cho nghĩa không thay đổi.)
1. Bioenergy as a form of renewable energy comes from natural sources.
⇒ As a form of renewable energy, _____________________________ sources.
2. We can produce bioenergy from food waste, manure, and other organic substances.
⇒ Bioenergy ___________________________ food waste, manure, and other organic substances.
3. Bacteria break down these organic substances, and methane is released.
⇒ These ______________________________ by bacteria, and methane is released.
4. We collect methane, and then use it to produce electricity and heat.
⇒ After _______________________________, it is used to produce electricity and heat.
5. We can also make methane into biomethane, called renewable natural gas (RNG).
⇒ Methane ___________________________, called renewable natural gas (RNG).
6. We can use renewable natural gas (RNG) as a vehicle fuel.
⇒ Renewable __________________________ used as a vehicle fuel.
7. We use bioenergy, and this limits the amount of methane released into the air.
⇒ Using ______________________________ methane released into the air.
8. We can reduce our dependence on fossil fuels by using bioenergy.
⇒ Thanks _____________________________, we can reduce our dependence on fossil fuels.
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