In one sense, the climate crisis is being caused by a rise in atmospheric CO2 and other so-called greenhouse gases. Science can address this cause. However, approached in another way altogether, this crisis is being caused by a range of troubling human activities that require the release of these gases, such as our obsessions with endless consumer goods, cars, certain food, lavish houses, fast fashion, air travel, and a broad range of additional lifestyle choices. The natural sciences may be able to tell us how these activities are changing our climate, but not why we are engaging in them. That is a job for the humanities and social sciences.