what does the author imply when he writes that the GDP figure.. “looks hard, but it was arrived at by computing a staggering set of rather soft variables?

The answer to this question is  c. pharmaceutical accumulation  reclaimed water refers to the water that being used again after it already  used for agricultural purposes.this type of water often contains pharmaceutical accumulation because of the chemical fertilizer that is used for the plants is absorbed into the water.

I’m guessing probably a

Loss of funding i think