[ac29]

> In the US, can you travel +1000km for next to nothing at +300km/h in an environmentally friendly way?

No, but the way that is worded essentially the only form of travel that meets those criteria is high speed electric rail in a country with little to no fossil fuel usage in the electric grid. For various reasons, passenger rail isnt as viable in the US as Europe (population density, suburban sprawl, etc).

You absolutely can travel >1000km at >300km/h for next to nothing in the US though, since air travel is quite inexpensive.