A global reforestation project is how we fix climate change

Re:A global reforestation project is how we fix climate change by awb on Thursday January 16, 2020 @02:20PM (#22067869)

> Thus, to reforest 3 billion acres at current prices will cost the world an investment of $3 trillion/year for 20 years. That sounds like a lot, but the world GDP of 2017 was $80 trillion. Therefore, this plan would require an investment of a little less than 4% of world GDP every year for 20 years.

$3T each year (4% of world GDP) for 20 years still sounds like a lot.

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Re:A global reforestation project is how we fix climate change by llebttam on Thursday January 16, 2020 @05:06PM (#22069535)

Yeah, it's definitely a lot.

I think the actual costs will be a lot lower as this will take many years of experimentation before scaling, and by then the cost of the solar panels (which I think is the vast majority of the cost) will likely have continued to ride its exponential downward cost curve. One source: https://earthtechling.com/solar-energy-costs-trends/

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