Failure to address climate change will prove catastrophic. The economic and social costs are enormous. Climate change will increase the frequency and impact of natural disasters such as hurricanes and floods, and increase the likelihood of unbearable heat and droughts. From an economic point of view, a hotter planet will make workers and agricultural land less productive, slowing economic growth and lowering living standards over time. All Americans will bear the costs of climate change, and the small fraction of the global population that has not yet been affected shrinks every day. Unchecked, these costs—which disproportionately impact marginalized communities—will continue to compound, harming working families through reduced wages, property loss, and worse health outcomes.