Elephants are one of the ______ species.
endangered
While walking, you shouldn't breath in ________ fumes.
exhaust
When the forest are burned or cut down, it is called ________
deforestation
Sun and wind are examples of _________ sources of energy.
renewable
____________ __________ is responsible for the rise of temperatures everywhere in the world.
Global warming
What's the noun from the verb 'emit'?
emission
You never drop _______ in the street.
litter
Over 80% of global _______ is _________ into the seas without adequate treatment
sewage, dumped
You try to eat less meat to ________ the amount of greenhouse gases.
reduce
The word 'smog' is combination of these 2 words:
smoke + fog