4K views · May 24, 2019 · 32:44 · 2 HN recommenders · 6 mentions · discussed 2019–2022
Tom Chi gives the opening talk of a Foresight Institute competition on clean energy and clean air, framing excess CO2 as a carbon debt to repay and discussing large-scale tree planting, including by drone.
Why Hacker News points people here: HN commenters call it a fantastic talk and cite it in climate threads for the carbon debt framing and tree-planting cost estimates.
“gave a fantastic talk on carbon debt”HN comment, 2019
“gave a fantastic talk on carbon debt”
Talk on carbon debt and how to pay it down.
Related: GoogleX co-founder Tom Chi gave a fantastic talk on carbon debt (with a rather depressing 238 views at the moment; I hope more people watch...): this video
“Agreed, this is an excellent talk.”
Frames CO2 as debt to repay; tree-planting by drone costed.
Agreed, this is an excellent talk. Main takeaway is to view the problem as debt which has to be paid off. Simply stopping new purchases will not pay off the debt. Above point summarized here, timestamp 22:15 - this video We currently have a one trillion ton carbon debt. As a though experiment, for a starting solution to iterate upon, this can be "paid off" with 20 billion trees / year, for 50 years. It would take 9000 drones, 450 staff, $80 mil/year. And a total land area half the size of Brazil. Using current technology. Compare this with alternative approaches being thrown around with price tags of 1 trillion+.
“A more recent (this year) talk advocating for similar, but using drones”
Recent talk advocating large-scale tree planting using drones.
It looks like that article is 10 years old. Has anyone done this at scale? A more recent (this year) talk advocating for similar, but using drones this video
“see GoogleX co-founder Tom Chi's video on climate change, sustainable agriculture, etc.”
Tom Chi on climate change and sustainable agriculture.
Related: see GoogleX co-founder Tom Chi's video on climate change, sustainable agriculture, etc.: this video
“our current carbon debt is around 1 trillion tons”
Source for the roughly one trillion ton carbon debt figure.
Yes, even if we completely eliminate carbon emissions, our current carbon debt is around 1 trillion tons [1]. We'll need to remove that much carbon from the atmosphere within 50 years or so, given we stop all of our emissions today. [1]: this video
“planting 20B trees/year requires only $80M/year (!)”
Cost estimate for planting 20B trees a year.
Related, for comparison: apparently planting 20B trees/year requires only $80M/year (!) and would pull down a trillion tons of carbon over 50 years (!): this video
