What is chloride shift

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere

The combining form leuk/o means red true or false

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.