1. smoke and harmful gases mix with water in the clouds and make rain that damages trees and buildings

recycling

Acid rain

litter

solar power

2. some buildings have special panels in the roof, which use energy from the sun to make electricity

congestion

solar power

global warming

acid rain

3. Omar usually buys chips on his way home, and drops the bag on the ground

litter

recycling

acid rain

global warming

4. Sara takes her old bottles to the bottle bank . New bottles are made from old glass.

acid rain

recycling

litter

congestion

5. Suzzan says there are always traffic jams and she can't find a place to park her car

global warming

congestion

solar power

litter

6. The Earth is getting warmer, because of air pollution which stops heat from leaving the atmosphere

global warming

congestion

solar power

acid rain