Hi jason, xcel

Yosemite NP has always been an environmental leader. When I used to work there in the early 70s they were already using propane propelled busses. Air in the Valley was pretty thick because the still allowed campfires. They were already kicking around a “master plan” that involved huge parking lots outside the Valley and only shuttle busses inside the valley. They are still kicking around the “master plan”, but at least the air is better and they keep upgrading the busses.

dan