Horror stories of children trapped in hot cars make headlines, but air pollution and impacts from a changing climate are more constant threats. Children are at higher risk for health changes due to these impacts for a range of reasons, including the way their bodies metabolize toxins, need more air on a per pound basis, and regulate temperature differently than adults. More than 90% of children under 15 regularly breathe air so polluted it puts their health and development at serious risk, while vector-borne diseases and water scarcity—scourges exacerbated by global warming—affect more than one in four children and more than one in three, respectively.