What is one critique of high-speed trains?

Question

answers
1) They need to be widely adopted to have real impacts.
2) They can reduce traffic congestion.
3) They cause large greenhouse gas emissions.
4) They travel too fast for people to want to use them.

Answer 1

One critique of high-speed trains is: 3) They cause large greenhouse gas emissions.

Although high-speed trains are often promoted as a more sustainable alternative to cars and airplanes, the construction and energy sources used for some high-speed rail systems can lead to significant greenhouse gas emissions.