New Hampshire's delegation to the Democratic National Convention will buy carbon credits to offset the environmental impact of the trip.
The delegates voted unanimously Thursday night for the plan, which is part of a challenge to all delegates going to the convention in Denver next month.
State party Chairman Raymond Buckley says the 30 delegates will contribute through a green company to four community-based renewable energy projects. They include a dairy farm methane project in Pennsylvania.
Buckley says alternate delegates, staff and guests also plan to buy carbon credits.