whats alarming to me is the low score on ecosystem vitality. as one can learn from the attached link, the rank is an avarage of: environmental health and ecosystem vitality. the high enviromental health score is a common rank among industrilized nations but the low ecosystem vitality score is alarming. the ecosystem vitality rate includes policies such as air pollution effect on ecosystems were U.S scored 44, and climate change 56 and indicators such as: marine protected area 38, emmition per capita 56 and per kwh 38.
although some data is missimg (about China ecosystem vitality) is missing, the U.S is ranked behind many countries like India, Canada, and Brazil in terms of climate change and air pollution.