sewerage
(system)

pollution

exhaust fumes

save
(+ opposite)

dump (verb)
(+synonym)

dump (noun)
collocations:
waste dump
rubbish dump
garbage dump

landfill

oil spill

acid rain

smog

outbreak

disrepair

shortage
(+synonym)

shortcomings
(+syn)

recycle

pollute

hamper
( hinder, prevent from)

relief efforts

care about

spread

drinking water

threat (to)
(+ verb)

global warming

cut down

natural resources

renewable energy

endangered animals/ species

degradable
(+ opposite)

famine
(+syn)

to worry

to run out of

harmful
(+ opposite)

climate change

drought

donar