Please answer each part of the following question with 2 short sentences. One for the effect and another for the reason/mechanism.
1. In each case below, please identify the effect on the market for coal and mention briefly the mechanism yielding to this effect.
a. The development of a new, lower cost mining technique
b. The imposition of a $2 per ton tax on coal
c. A new government regulation requiring air purifiers in all work areas