Which of the following is not an example of chemical weathering?
a. natural plant acid breaking down a rock
c. oxidation of metals
b. acid rain deteriorating a marble statue
d. ice wedging in rock

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?