Geoengineering, or using science and technology to change the Earth in order to slow global warming, does rouse intense feelings. Proposed geoengineering techniques include pumping sulfur dioxide into the stratosphere, building a sunscreen in space, and lofting sea salt into the atmosphere. The concern is that these actions would have drawbacks and unanticipated side effects. They all avoid the root causes of climate change–including a dependence on technologies without fully understanding their consequences. Much more research needs to be done before implementing any of these techniques, and research is never cheap. Funding geoengineering solutions that are in no way guaranteed to work diverts money from research into renewable fuels and other green technologies.
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