Some geo-engineers believe we can generate almost-instant forests by dropping "tree bombs" from a plane.

CASE STUDY: Dropping tree bombs

How humans can respond to climate change is a discussion topic that usually includes some pretty fanciful sounding ideas from wrapping Greenland in a blanket, to putting a giant sunshield in space.

Another idea is ‘tree bombs’. Given that trees absorb carbon dioxide, it is often argued a vital way to reduce climate change is to plant more of them, and quickly. Environmental engineer Mark Hodges thinks forest could be created by dropping wax containers full of fertilisers and seedlings from planes. The containers explode when they hit the ground allowing trees to spring up.

Before passing this idea off as too out there, keep in mind ‘Tree Bombs’ have been used in Louisiana after Hurricane Katrina to regenerate mangrove forests.

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