Nowadays, customers like to buy ______ products.
environment
eco-friendly
friendly
nature
____________ is one of the most serious environmental problems.
Global warming
Rain
Water
Reducing
If more people cycle, the air will be _____.
bigger
cleaner
smaller
dirtier
Water is good ______ for our health.
for
in
give
with
The 5 types of pullution will ______ the environment.
destroy
reuse
reduce
pollution
