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michael_nielsen's profile
michael_nielsen
michael_nielsen
michael_nielsen
@michael_nielsen

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michael_nielsen

@michael_nielsen

Searching for the numinous. Co-purveyor of https://quantum.country/ 

San Francisco, CA
michaelnielsen.org
Joined July 2008

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    1. Steven Pinker‏Verified account @sapinker Jul 4
      • Report Tweet

      To prevent possibly catastrophic climate change we can't just bring C02 emissions to zero - we have to go negative, sucking the CO2 that's already there. The best tech is a billion years old: trees. Massive Reforestation could Slow Global Warming.https://www.scientificamerican.com/article/massive-forest-restoration-could-greatly-slow-global-warming/ …

      448 replies 2,514 retweets 7,261 likes
    2. michael_nielsen‏ @michael_nielsen Jul 4
      • Report Tweet
      Replying to @sapinker

      Interesting - 205 GT is about 6 years of annual CO2 production. So a useful contribution, but only a small part of what's needed over the long run.

      1 reply 1 retweet 12 likes
    3. Azeem Azhar‏Verified account @azeem Jul 4
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      Replying to @michael_nielsen @sapinker

      It does represent about 20ppm. In absence of silver bullets, might be a useful tool while we work out how to decarbonise elsewhere.

      1 reply 0 retweets 3 likes
      michael_nielsen‏ @michael_nielsen Jul 4
      • Report Tweet
      Replying to @azeem @sapinker

      I wonder how much extra efficiency synthetic biology might achieve here. The basic cost-benefit already seems pretty good: 6 years CO2 (or 20ppm) for $300 billion is very inexpensive compared to (say) the EPA's estimate for the cost of the Clean Air Act in the US.

      10:36 PM - 4 Jul 2019
      • 2 Likes
      • sanjaya act65
      1 reply 0 retweets 2 likes
        1. New conversation
        2. michael_nielsen‏ @michael_nielsen Jul 4
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          Replying to @michael_nielsen @azeem @sapinker

          The article claims 205 GT is 2/3 all the CO2 generated by humans since the industrial revolution. I think they mean Carbon in CO2, not CO2. Seems like a pretty bad error, and I wonder what else is wrong in the SciAm article? Presumably not in the source.

          2 replies 0 retweets 4 likes
        3. Azeem Azhar‏Verified account @azeem Jul 4
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          Replying to @michael_nielsen @sapinker

          Mmm. I haven’t read the sciam article and the original paper is queues for me to read later today, so I will look at those claims in more detail.

          0 replies 0 retweets 1 like
        4. End of conversation

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