Some Americans recognize the health harms of global warming, but many do not. Many Americans have thought (32%) or worried (28%) a “great deal” or “moderate amount” about the health harms of global warming, similar to the percentages in 2014. 39% of Americans think Americans’ health is being harmed by global warming “a great deal” or “a moderate amount,” an 8 percentage point increase from 2014. However, only 16% think their own health is being harmed by global warming a “great deal” or a “moderate amount.” 47% of Americans understand that some groups in the U.S. are more likely than others to experience the health harms of global warming, +13 points since 2014. When asked to name groups more likely than others to be affected, Americans most commonly identify low-income people (18%, +12 points since 2014), older adults (7%), people with health conditions (6%), and people of color (6%, +5 points). Most Americans think coal (65%) harms people’s health, and many think natural gas does (38%, +9 points since 2018). 39% of Americans think federal agencies such as the Centers for Disease Control and Prevention (CDC), the National Institutes of Health (NIH), and the Federal Emergency Management Agency (FEMA) should do more to protect people from health harms related to global warming.