1. scientists have discovered that acid rain is caused by
a. acid evaporating into the atmosphere.
b. sulfur introduced into the atmosphere from burning coal.
c. hydrochloric acid in clouds.
d. gas introduced into the atmosphere from animal wastes.

coal is not sustainable because it will one day run out.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.