1) alternative (adj) / ɔ:l'tə:nətiv /: có thể lựa chọn thay cho vật khác

I'm afraid I have no alternative but to bother him.

2) dangerous (adj) /'deindʒrəs /: nguy hiểm

This snake is very dangerous.

3) harmful/ˈhɑːrm.fəl/ (adj): có hại

This smoke is harmful to your health.

4) non-renewable (adj) /,nɔn ri'nju:əbl/: không phục hồi, không tái tạo được

Coal is a non-renewable power.

5) renewable (adj) / ri'nju:əbl /: phục hồi, làm mới lại

The wind is renewable power.

6) abundant  /əˈbʌn.dənt/ (adj):dồi dào

low-cost consumer goods are abundant.

7) available /əˈveɪ.lə.bəl/ (adj):có sẵn

Is this skirt available in a larger size?

8) exhaustible /ɪɡˈzɑː.stə.bəl/ (adj): cạn kiệt.

Many of the earth's resources are exhaustible.

9) expensive  /ɪkˈspen.sɪv/(adj): : đắt

Big castles are expensive to maintain.

10) limited /ˈlɪm.ɪ.t̬ɪd/ (adj):hạn chế

My  English skills are rather limited.

1) biogas (n) /'baiou,gæs/: khí sinh học

Biogas is a sustainable fuel generated from the decomposition of organic materials like food scraps and animal manure.

2) electricity (n) /,ɪlɛk'trɪsɪti /: điện

The power has been disconnected.

3) hydropower (n): năng lượng thủy điện

The use of falling or fast-running water to generate energy or power machinery is known as hydropower.

4) nuclear power (n): năng lượng hạt nhân

The spread of nuclear power is a contentious topic.

5) fossil fuel (n): nhiên liệu hóa thạch

In global energy networks, fossil fuels play a prominent role.

6) solar power (n): năng lượng mặt trời

As part of a trial initiative, the city will install 25 solar power installations