Planetary boundaries Flashcards
1
Q
Define planetary boundary
A
limits between which global systems must operate to prevent abrupt and irreversible environmental change
2
Q
List the nine planetary boundaries
A
1) atmospheric aerosols
2) climate change
3) ocean acidification
4) biogeochemical cycles
5) novel entities
6) freshwater use
7) ozone depletion
8) land system change
9) biodiversity integrity
3
Q
what boundaries have been crossed
A
1) climate change
2) biodiversity integrity
3) biogeochemical flow
4) land system chnage
4
Q
what boundaries have been avoided
A
1) ozone depletion
2) freshwater use
3) ocean acidification
