Our planet is in trouble. Climate change is real. Widespread, tumultuous change has occurred in our atmosphere, oceans, biosphere, and cryosphere, driving weather and climate extremes, anomalies, and record heat across the globe. Already, the damage has been substantial. ‘[Climate change] has led to widespread adverse impacts and related losses and damages to nature and people’ (Sixth Assessment Report, UN Intergovernmental Panel on Climate Change, or IPCC). And the cause is well known. Decades of research and legions of scientists attest unequivocally that human-caused greenhouse gas emissions are causing global warming, threatening to precipitate unprecedented levels of global heating across the planet.