(PD photo from Wikimedia)
The weekend before last, the Mt. Washington Cog Railway dedicated their brand-new diesel locomotive! For the preceding 139 years, all of the locos on "The Cog" were coal fired (except for the original loco, Old Peppersass, which burned wood and is still on display at the Base Station).
This new loco is named "Wajo Nanatasis", which is Abenaki for "Mountain Hummingbird". It burns biodiesel, and is not just cleaner, but faster-the round trip now takes 2 hours instead of 3.
Click on the post title for more info, including a few pictures of the old-timer locos, one of which has also been modified to burn biodiesel.