Transportation is responsible for one quarter of the world’s greenhouse gas emissions. While companies have touted electric vehicles and sustainable aviation fuel as ways to cut emissions from air and ...

A correction to an earlier version of this article has been appended to the end of the article. Since Caltrain has switched to electric trains, their retired diesel fleet will be sent to Lima, Peru, ...

A new diesel-engine train will make its debut at the Milwaukee County Zoo on September 13. Engine No. 2025 — a 15” Tier 4 diesel hydraulic ...