Park tests hybrid buses in McKinley’s shadow

ANCHORAGE, Alaska – For years, visitors wanting to see Denali National Park’s grizzly bears, moose, sheep and caribou have had to ride school buses that polluted the air and spoiled the tranquillity with their noisy, carbon dioxide-spewing diesel engines.

Now park officials are testing a hybrid bus that promises to run cleaner, cheaper, and quieter.

The 230-horsepower hybrid bus