Climate change is negatively impacting human health in several ways. Burning fossil fuels releases carbon dioxide that is trapping heat in the atmosphere, causing the planet to warm. This is exacerbating air pollution like wildfire smoke and ozone, triggering asthma attacks. Higher temperatures also increase the growth and spread of allergens and molds. Warming leads to more extreme weather like heat waves and flooding, spreading waterborne illnesses. Reducing emissions through climate action could prevent hundreds of thousands of premature deaths and cases of heart disease, diabetes and cancer each year.