The answer is C genetic variation
we will run out of resources an population will decrease
1 you run out of fuel 2 it takes a long time 3 it’s hard to get back 4 the conditions are constantly changing making it harder to predict what could happen. Look at Apollo 12 as a example
Things too small to be viewed by a light microscope can be viewed with an Electron Microscope
Hope this helps!
Answer:
The green revolution solved one problem but created new ones
Explanation:
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