The Carbon Removal X-Prize entries must remove at least 1 ton per day. Assuming that is a metric ton of carbon, that means 3.7 tons of CO2, which is 3360 liters of liquid CO2, or 140 liters per hour. Someone is going to win $50M for this flow rate.pic.twitter.com/7OWenhwBlj
Because predictions of electric vehicles are like, they will be the majority of new car sales by 2040. So you still have a huge fleet of legacy gas vehicles for a very long time.
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Even if those predictions are insufficiently optimistic, it is still going to take quite a while.
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Not as long as replacing petroleum with synthetic hydrocarbons. People using old vehicles are going to be very price sensitive for fuel. It probably makes the most sense to just go on burning fossil fuels, and use some form of accelerated weathering to limit atmospheric CO2.
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