D- because they are used for things such as highways, parks, libraries, and schools.
We refer to World War one as Total War, because this term describes a war in which countries or nations mobilize and force to the limit all their available resources, be they human, military, industrial, agricultural, natural, technological , scientists, or of any other kind, to totally destroy the ability of another country or nation to engage in a war, and this was what happened in the First World War.
It demonstrated that adding iron to the ocean can incite an unobtrusive phytoplankton sprout, however insufficient to bring about major climatic change. Later investigations demonstrated more prominent microscopic fish sprout. General it bolstered the speculation, however, it wasn't the last word.
It is as yet vague on the off chance that it would be conceivable or moral to incite worldwide tiny fish sprouts to diminish barometrical CO2