GDP excludes the value of all these goods and services EXCEPT

Explain how economists use random experiments

What will be an ideal response?

Why might it be hard for companies to know how much pollution should be cleaned up?

A. Costs are too high so it's not worth all the time and effort to clean up the pollution. B. Many costs of pollution are hard to see or itemize to get an accurate amount of the true cost. C. The government is not clear on the rules and regulations for cleaning up pollution. D. Companies value production and profit too much so they do not want to clean up too much.