Environment

Cars produce exhaust ____________ that harm the environment.

The Moon _____________ the Earth about once a month.

Scientists __________________ that the Earth will become warmer.

Driving carefully can help ________________ accidents.

Some people believe that humans will ______________ the Moon in the future.

Doctors ____________ patients in hospital when they are ill.

Soon, the Earth won't be big enough to ______________ the growing population.

In the future, we'll be able to ________________ with robots and have conversations with them.

__________________ electricity

Animals become _____________ .

water __________

________________ power