Dirty water that pollutes rivers is called s...... .
sewage
The Amazon rainforest produces 20% of the world o......... .
oxygen
Many wild animals are threatened with e............ .
extinction
Most birds build n......... to live in.
nests
A.............. c.............. is a machine that keeps us cool in the summer.
air conditioner
Something very big is h.......
huge
P................ is something which makes our environment dirty.
pollution
E.......... f...... are smoke which comes from the engine of a car.
exhaust fumes
You put rubbish in a d...........
dustbin
A big shop with many little shops is called a d........... s.......... .
department store