overpopulation, pollution, burning fossil fuels, & deforestation that have triggered climate change, soil erosion, poor air quality, & undrinkable water
A. energy conservation
B. human impact
C. sustainability
D. availability
E. natural resources

Random Topics:
AdverbWish SentenceGerunds as Objects of PrepositionsPresent and Past Simple PassiveFood VocabularySimple Future - WillAdverb of TimeCountable & Uncountable NounsBe going to / WillVerbs with Prepositions and ConjunctionsOther quiz:
Grammar › ViewWhich is a complete sentence?
A. After leaving the road.
B. The group took out their map.
C. To check that they were on the right path.
D. And had not become lost.
Grammar › View
The organising committee ___________ a meeting for all members next week.
A. conducts
B. conducted
C. will be conducting
D. has conducted
Modal Verb › ViewIt’s possible that I’ll come to your party
A. I should come to your party
B. I will come to your party possibly
C. I must come to your party
D. I might come to your party
Grammar › View
What _____ to Jack yesterday evening? He didn’t come to my birthday party.
A. happened
B. was happen
C. did happen
D. was happening
