About one-fourth (27 percent) of the UHNW – who have a net worth of $5 million up to $25 million, not including primary residence – indicate they have or plan to buy a more energy-efficient car. A similar share (23 percent) report monitoring their energy bills to become more energy efficient.

The youngest UHNW – those ages 46 and younger – are most likely to buy a more energy-efficient car (35 percent), while the oldest – those ages 65 and older – indicate the highest levels of concern over global warming (33 percent). Overall, three-in-10 UHNW investors indicate they are concerned about global warming. Recycling and monitoring energy bills is most common among early baby boomers, UHNW investors ages 47 to 54.