Major League Baseball takes a few symbolic steps and then claims to be a "powerful leader in the global green movement"

The Official Site of Major League Baseball: News: Baseball embraces spirit of Earth Day

From a related link here:

By the end of the [2008] regular season, the Mariners will have traveled a franchise-record 55,000 miles.

Also on the MLB web site is this article:

DALLAS -- When it comes to travel, the Rangers believe they are at the top of the league.

Their new 757 charter aircraft that they unveiled on Tuesday at Love Field is the latest evidence of that.
...The Rangers flew approximately 60,000 miles this season...

Another related article is here, entitled "Dodgers' trip to China [from Florida] delayed a day by charter problem".