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@teller ("Siim Teller") retweeted:
@XavierHelgesen ("Xavier Helgesen") replied to a tweet by @XavierHelgesen:
Let’s start at the beginning: what’s the problem?
The problem is that it is free to pollute the atmosphere with CO2.
Because it is free, lots of business models make sense.
Examples: oil extraction, gas stations, global container shipping, international air travel, etc.