Self-driving electric haulers could soon be hitting railway tracks.
Meanwhile, an American startup has developed a system which removes CO2 from the atmosphere during rail traffic.
Air flows in through an aperture on top of a container car stationed in between track vehicles. The CO2 is extracted and stored within a chamber, with clean air flowing out through the rear.
The process is powered by the train itself. Braking energy, rather than being lost as waste heat, is converted and stored in a 2,400 kWh battery composite.
Each braking manoeuvre has the potential to remove up to 1.5 tonnes of CO2 from the air.
Could be combined with this moving hotel to make travel even more sustainable.