In different phrases, it amounts to a question of who buys hybrids, why they purchase them and whether or not they buy them in enough numbers to have an impact. The variety of hybrids being purchased, and why, is tough to pin down as a result of buying patterns are driven by several components. Consider the consequences of fuel costs, for instance: Since the arrival of the Prius, and at numerous times in the historical past of hybrids basically, people have purchased more hybrid automobiles as gas costs have climbed, but they've additionally bought muscle cars and SUVs regardless of rising gas costs. Although financial rebound effects, which undercut the fiscal rewards of a expertise by introducing countervailing behaviors, should not but evident, they could doubtlessly attend the more intensive embracing of hybrids