[iso947]

The StopHS2 Anti high speed rail group says that the 530km HS2 line (and tons of stations) will generate 1.5 million tons of co2, for 18,000 seats an hour 12 hours a day in each direction.

400k seats a day, or 150 million a year, for an average 10kg co2 per seat in construction costs over the first year.

456km London to Paris is is about 100kg co2 each way per seat.

So construction emissions isn’t even a dent in the first year.