Excellent article by Marina Schauffler (“Sea Change: Getting a grip on climate change,” May 18) on the American Association for the Advance of Science’s climate change report, “What We Know,” and what Maine farmers have known for at least a decade.

However, she didn’t give readers a clear understanding of what they can do about a global problem that is so big that it feels to most people as if their individual actions cannot really make a difference.

Readers can make a difference if they write or call Sen. Susan Collins and ask her to again sponsor carbon pricing legislation to lower emissions. The senator sponsored very creative climate change legislation in 2010, but it wasn’t enacted.

It is time for her to try again because the political will is growing in the U.S. for congressional action on climate, but this action needs Republican sponsorship in order to be successful.

Readers should also encourage Collins to cosponsor climate legislation with Sen. Kelly Ayotte, R-N.H. Sen. Ayotte was a valuable ally in last fall’s action to pass a federal budget, and New Hampshire shares similar concerns with Maine regarding changing climate and rising seas.

Judy Weiss

Brookline, Mass.