What substance must plants produce in order to make lipids?

The science for classifying and naming organisms is known as

What will happen if deforestation continue to destroy the green plant on the planet

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