Forests cover one-third of Earth’s landmass. These ecosystems all provide vital ecological and economic services. Why might it be more difficult to convince the human population of the value of a forest’s ecological services as opposed to the value of its economic services? A. Ecological services cannot be monetarily estimated.

B. Ecological services are not easily observed by the average human.

C. Ecological services detail the cost of use on the environment.

D. Ecological services are only a focus of less developed economies.