What is the greenest way to travel?
Since takeoff is the most fuel-intensive part of a plane trip, longer flights emit fewer greenhouse gases per mile than shorter ones, and nonstop flights are greener than ones that require connections. For this reason, a single traveler is better off flying directly from New York to Los Angeles than driving.
What is the most environmentally friendly mode of transportation?
Public transport overall is generally considered to be one of the better options when it comes to reducing the negative environmental impact of urban mobility. Taking a bus, even if it runs on diesel, as the majority do, is exponentially better than taking an electric car or taxi.