A sign, part of a public design installation by artist Thomas Starr, is displayed on a gazebo outside the University of New Hampshire boathouse in Durham, N.H., Wednesday, Oct. 16, 2019. Starr, a graphic and information design professor from Boston's Northeastern University, created the project to address possible effects of climate change. (AP Photo/Charles Krupa)

A sign, part of a public design installation by artist Thomas Starr, is displayed on a light pole outside town hall in Durham, N.H., Wednesday, Oct. 16, 2019. Starr, a graphic and information design professor from Boston's Northeastern University, created the project to address possible effects of climate change. (AP Photo/Charles Krupa)

Artist Thomas Starr poses next to a sign, part of a public design installation, on the banks of the Oyster River in Durham, N.H., Wednesday, Oct. 16, 2019. Starr, a graphic and information design professor from Boston's Northeastern University, created the project to address possible effects of climate change. (AP Photo/Charles Krupa)

A sign, part of a public design installation by artist Thomas Starr, is displayed under oak trees along the banks of Mill Pond in Durham, N.H., Wednesday, Oct. 16, 2019. Starr, a graphic and information design professor from Boston's Northeastern University, created the project to address possible effects of climate change. (AP Photo/Charles Krupa)

Artist Thomas Starr holds sign printouts, part of a public design installation, on the banks of the Oyster River in Durham, N.H., Wednesday, Oct. 16, 2019. Starr, a graphic and information design professor from Boston's Northeastern University, created the project to address possible effects of climate change. (AP Photo/Charles Krupa)