7th Ch2 section 4 Flashcards
1
Q
smog
A
thick haze of smoke and chemicals
2
Q
acid rain
A
chemicals from air pollution that combine with precipitation
3
Q
greenhouse effect
A
build up certain gases in the earths atmosphere that, like a greenhouse, retain the suns warmth
4
Q
crop rotation
A
changing what farmers plant in a field from year to year
5
Q
deforestation
A
cutting down of forests without replanting new trees
6
Q
conservation
A
fwgf
7
Q
irrigation
A
rfergfweg
8
Q
pesticide
A
weferwg
9
Q
ecosystem
A
wrgfrwgrwe
10
Q
biodiversity
A
rgfrg
