@rmcrob National jurisdictions will do fine. On renewables. If you really think it is "theoretical" then that's the extent of my engagement. Cap and trade would be OK too.

@calumryan I’m doing Brussels London by train after Utrecht because it is actually cheaper!

@jeremycherfas Who will be the taxing authority? How will the tax money be spent? How will any theoretical manmade climate change be affected?

@calumryan Only 10 hours. That seems incredible. It isn’t the time that bothers me, it is the price. Top whack carbon tax can’t come soon enough.