Water is one of the world's most important ____________ , so it's necessary to protect it.

• resource

• limit

• crisis

• problem

Wind power is another ______________ form of renewable energy.

• systematic

• alternative

• experienced

• dangerous

Cheap and clean energy should be ______________ for people.

• explained

• solved

• provided

• expensive

One ____________ to the problem of air pollution is to use public transportation instead of cars.

• environment

• solution

• resource

• situation

__________________ is when we remove the salt from seawater to create fresh water.

• Desert farming

• Extreme climate

• Desalination

• Global warming

_________________ means growing plants in water.

• Hydroponics

• Nutrients

• Greenhouse

• Traditional farming

Laura _______activated all her social media accounts.

• un

• de

• in

• dis

Smoking is regarded as one of the _____social habits.

• anti

• mis

• dis

• de

The new sports centre will bring long-term ____________ to the community.

• benefits

• energy

• power

• sadness

Comparing to nuclear power, wind energy has a lower __________ of danger.

• advantage

• happiness

• turbine

• risk