Comments by "Tony Wilson" (@tonywilson4713) on "The Net Zero Myth. Why Reaching our Climate Goals is Virtually Impossible" video.

  1. AEROSPACE ENGINEER HERE: I love the enthusiasm you have for science and technology but I am sorry to say that we are in the deep crap zone a lot further than people realise. As an undergrad back in 1987 we had a special guest lecture one Friday. It was an Alum who worked at NASA and had just completed a project on the feasibility of terraforming Mars. He started with "Its impossible and here's why!" He introduced 2 things which I now call "Planetary Mechanics" & "Planetary Dynamics" Planetary Mechanics is simply the calculation of what you need to do. Like to put a 1km thick layer of Earth normal air around mars is a pretty simple calculation and it give 178 Trillion tons. At that point you suddenly realise how big the task actually is. Planetary Dynamics is how you make things like water cycles, oxygen cycles, thermal cycles,.... work. AND NOBODY has come close to succeeding at that. When you apply some basic planetary mechanics to the Earth it gets kind of staggering. The Earths surface is 510 million km2. If you look at just the first kilometer above the Earths surface you can basically say there's 500 million CUBIC kilometers of air. Also to get 400ppm of CO2 which is 0.04% down to 300ppm of CO2 which is 0.03% is 0.01%. So when people talk about direct air capture you have to think in terms of: "How do you process 500million or 1/2 a Billion cubic kilometers of air and extract/separate about 0.01% of that?" How do you think ANYONE is going to do that? For some of these DAC systems people talk about: - How do they process that much? - How much machinery does that take? - How to they power that much machinery? If your wondering. These are all the sorts of questions you have to ask if you are going to build a moon base, which was my goal in life.
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