Unit 10. Sources of energy

renewable means

• không thể tái tạo

• cạn kiệt

• tái chế

• có thể tái tạo

Choose the answer that best describes the picture.

• carbon footprint

• carbon dioxide

• hydro

• biogas

Choose the picture that best describes the word/phrase.

polluted

• 
• 
• 

exhausted means

• dồi dào

• độc hại

• cạn kiệt

• thay thế

Choose the picture that best describes the word/phrase.

turbine

• 
• 
• 

Wind power is one of the earliest ___________ sources of energy used by humankind.

• alternative

• polluted

• harmful

• exhausted

Nobody can predict exactly when supplies of fossil fuels will be ___________. However, we all know they quickly reduce in quantity.

• installed

• polluted

• harmful

• exhausted

Biogas can be used to ___________ natural gas in cooking, heating, or electrical generation.

• use up

• replace

• pollute

• install

Solar energy can be used for ___________ electricity, and for hot water heating.

• investing

• polluting

• generating

• installing

The non-renewable sources of energy that we are using are ___________ and are bound to expire one day.

• limited

• plentiful

• abundant

• alternative