> Turning a whole lot of flights into energy and carbon-saving train trips is a huge benefit.
Consider the embodied carbon of 500 miles of train tracks and embankment. The carbon released from producing all that cement, smelting the steel, and diesel fuel to move the earth is immense.
This claim that train infrastructure construction will negate the carbon savings of train travel is just a factually untrue argument.
You also can’t power planes with renewables like solar.