The environment

Overpopulation

Deforestation

Recycling

Pollution

The burning of fossil fuels.

The melting of ice caps.

Wasting water at home.

acid rain.

endangered species.

the greenhouse effect.

exhaust fumes.

Reduce, reform, recapture.

Reduce, reuse, recycle.

Rebook, recall, recycle.

Recollect, reuse, restrain.

Reduce, reuse, recycle.

Plant a tree.

Save water.

Buy more plastic bags.

Use energy saving bulbs.

Drive more efficient cars.

Save water.

Switch on air conditioning systems.