Landfills have a negative impact on the environment.
Landfills are the places that our garbage is taken to be buried.
Burying our garbage has a negative impact on the environment.
What damages our environment?

(a) Pollution
(b) flooding
(c) harmful substances
(d) Burying garbage
(e) humans disturb it
(f) Planting trees
(g) Recycling
(h) Using renewable energy