Big group bicycle rides, centuries and the like, aren't green either. Drive 220 miles, ride 100. Even bike touring is not necessarily green. I'm thinking of tours that involve long airplane or automobile trips. Start and end a tour at your door, a tour you just might have done in a car, and you've done something you could call green.
Bike commuting truly is green but bike commuting is difficult.
It's cold in the winter and wet when it rains. Freshly oiled, cocked, and locked, if you know the expression. Tough and scary as it is, commuting attracts mostly cycling true-believers. Hey, maybe you're a true-believer yourself, or on your way to becoming one. Ride your bike to work.