Recyclable products should not be ended up in open ............ sites.

• landfill

• leftover

• resource

• footprint

It’s such a ............ of clean water when you forget to turn the tap off.

• awareness

• waste

• pile

• packaging

Many high school students volunteered to ............ the polluted river.

• get rid of

• go green

• rinse out

• clean up

In order to reduce our ............, we should cycle or take a bus to school instead of using motorbikes.

• cardboard

• leftover

• fruit peel

• carbon footprint

It takes hundreds of years for one plastic bottle to ............ in the ground.

• release

• reuse

• decompose

• recycle

Several traditional customs that can do damage to the environment should be changed for a more ............ future.

• sustainable

• reusable

• single-use

• recyclable

Ms. Brown often uses leftovers to make her own ............ .

• waste

• container

• compost

• layer

The water has become undrinkable because it has been ............ with lead.

• sorted

• decomposed

• recycled

• contaminated

They ............ extensive research on the environmental effects of using fake Christmas trees.

• turned off

• carried out

• look after

• applied for

Many celebrities adopt a green lifestyle, ............ helps the environment a lot.

• that

• what

• whose

• which