White House: Blocking the sun could stop climate change – but how can it be done?

Recently, the White House announced it was funding a 5-year research plan on how to artificially modify the Earth’s climate. One idea is to find a way to block out the sun by spraying aerosols into the stratosphere to reflect sunlight, just like a volcano would do if it erupted violently. The United Nations recognized the potential of this, but critics said there could be a problem with experimenting with it.

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