Learn about the impacts of salt on the Mississippi River and the surrounding watershed at the Mississippi Watershed Management Organiztion, Saturday, Feb. 1, 10 am-12 pm. Artists Kimberly Boustead and Annie Hejny will lead an art-making activity centered around the interaction of salt and water, and MWMO staff member Abby Moore will share information about salt pollution in the river and best practices to prevent it. Free, but registration required (https://www.eventbrite.com/e/art-science-on-the-river-salt-workshop-tickets). MWMO, 2522 Marshall St. NE.