I believe the blank is "mass."
Answer:
land subsidence,sinkholes,freshwater contamination and having to dig deeper and deeper irrigation wells
ANSWER:
A
Explanation: chimpanzees have 0% difference from humans.
Answer:It causes random changes and the allele frequency of certain traits may increase or decrease.
Explanation:
Hope I am right
I'm assuming the answer would be greenhouse gas.
Greenhouse gases are those that trap infrared radiation (from the sun) and contribute to the greenhouse effect.