As climate change shifts from a “far-off problem” to “eminent threat” in public perception, governments and billionaire philanthropists scramble to mitigate the impacts of global warming. Geoengineering, the radical transformation of the environment and ecosystem, has been an object of considerable interest. There are two main approaches to man-made climate intervention: Aerosol geoengineering, the spraying of particulates into the atmosphere to partially block the sun, has dominated discussions, while aquatic geoengineering remains comparatively unknown.
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