A rent ceiling set below the equilibrium rent will

We can derive the market demand curve for gold earrings

A) only if the tastes of all gold earring consumers are similar. B) by adding the prices each gold earring consumer is willing to pay for each quantity. C) by adding horizontally the individual demand curves of each gold earring consumer. D) by adding vertically the quantity demanded of each gold earring consumed at each price.

Transborder environmental impacts can take place when one country's pollution spills over into a second country in all of the following situations EXCEPT

A) when an upstream user pollutes a shared watershed. B) when industrial production in one country creates acid rain in another country. C) when heavy traffic between two or more countries creates semi-global warming. D) the production of exported products degrades the local environment. E) ozone depletion caused by many countries' pollution spills or emissions.