The Opportunity
Every year, globally running trains, both diesel and electric, dissipate about 420 tWh of braking energy as rheostatic waste heat. This is more than all but 10 countries use annually, over 4x the annual output of the Three Gorges Dam in Chinia, and 105x the annual output of the Hoover Dam in the US.
Until now, this enormous amount of electrical energy has been wasted in most rail operations. CO2Rail uses it to power CO2 removal from both ambient air and emissions from diesel-powered trains.