Snowmobile Controls May Be Working

Washington D-C – A new study suggests that pollution limits on snowmobiles may have helped. The study, commissioned by the Park service,focused on the west entrance of Yellowstone National park. It shows employees in Yellowstone were exposed to lower levels of air and noise pollution, after new limits took effect on the number and type of snowmobiles allowed in the park.
But researchers say further study is needed, before they can make a direct connection between the declines in noise and pollution and the new snowmobile rules.