The graph shows three models of world population growth.

according to the un projections, at what point might earth first see a catastrophic drop in population?

a. around 2020
b. around 3000
c. around 2060
d. the graph does not show a drop in population.

The current option is A) Around 2020

Explanation:

The graph in the diagram shows that around 2020, there might be an up rise in the population of the world or there might be a catastrophic drop in the population of the earth. The reason for this decline is not mentioned in the graph. Bit it can be seen in the graph that out of the three models of world population growth, one of the models depicts a catastrophic decline in population around 2020.

the national environmental policy act (nepa) is a united states environmental law that promotes the enhancement of the environment and established the president's council on environmental quality (ceq). the law was enacted on january 1, 1970. to date, more than 100 nations around the world have enacted national environmental policies modeled after nepa.

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.