I agree our current offset regime is a scam. That doesn’t mean it’s impossible to do right, or that doing it right shouldn’t be a precondition to scaling something like supersonic travel. (Would note that linking to Greenpeace seldom strengthens one’s argument.)

> we chose to do it willingly or we'll be forced to do it

These outcomes are distributed differently.

What's the problem with Greenpeace?

Because I'm funding their actions since 20 years now, and I wonder if I should switch to something else, like Exxon maybe.

Or... I should stop giving indirectly any €€€ to Exxon and alike, and give all the gains to Greenpeace instead.

So your argument is based on a scam program and fuels we don't really have yet

That's not very convincing. In a perfect world with perfect people and infinite money we could indeed do a lot of crazy things, but then again we have to deal with reality

> your argument is based on a scam program and fuels we don't really have yet

Your problem is based on a Mach 9 proposal and technology we don’t really have yet. We’re both necessarily speculating.