Presentations on the carbon challenge:

Sunday, March 11, 3 p.m., Rye Library

Wednesday, March 14, 7 p.m., Friends Meetinghouse, 141 Central Ave., Dover

Tuesday, March 27, 7 p.m., Seacoast Area League of Women Voters, 89 Dover Road, Durham (meeting room of Durham police station)

Wednesday, April 4, 7 p.m., Durham Public Library

Visit carbonchallenge.sr.unh.edu for details.