"This dramatic shift towards bigger and heavier cars has led to a doubling of the share of SUVs over the last decade. As a result, there are now over 200 million SUVs around the world, up from about 35 million in 2010, accounting for 60% of the increase in the global car fleet since 2010. Around 40% of annual car sales today are SUVs, compared with less than 20% a decade ago."
And it's not just America.
Regulation is necessary and while I can see it coming into play in Europe, it's hard to imagine it coming to the U.S. Although, perhaps strong incentives for efficient vehicles could perhaps help.