'The Power of Plants and the Botany of Desire: Who's Gardening Whom?' sponsored by Hardy Plant Society of Oregon, talk by Michael Pollan, 1:30 p.m., Kaul Auditorium, Reed College, 3203 S.E. Woodstock Blvd., $15 members, $25 nonmembers. Call 503-224-5718.
'It's Your Health,' sponsored by local healthy living advocates, talks by Ladd McNamara, author of 'Dr. McNamara's Medical Resource Manual for Nutritional Supplementation' and Deborah Waitley, co-author of 'The Psychology of Winning for Women,' 2 p.m. to 7 p.m., Embassy Suites Hotel Portland-Airport, 7900 N.E. 82nd Ave., $39 in advance, $50 at door. Call 503-693-8383.
Health fair, sponsored by Pacific University School of Physician Assistant Studies, includes screenings for blood pressure, blood glucose and foot care, 10 a.m. to 6 p.m., Lloyd Center, lower level courtyard in front of Nordstrom. Call 503-352-2898.
'Landscape Legacies: Learning from Our History,' lecture series sponsored by Illahee, talk by environmental historian William Cronon, 7:30 p.m., First Congregational Church, 1126 S.W. Park Ave., $15. Call 503-222-2719.
'Common Ground: Oregon's Ocean,' sponsored by Green Fire Productions, documentary about Oregon's ocean fisheries, discussion follows film, 7 p.m. to 9 p.m., Hollywood Theatre, 4122 N.E. Sandy Blvd., $5. Call 503-493-1128.
'Clean Up Your Credit Rating for the New Year,' sponsored by Unitus Community Credit Union, seminar on credit reports with tips on cleaning up credit rating, 6:15 p.m., Unitus, Mall 205 branch, 10555 S.E. Washington St. Call 503-227-5571.
'Does Oregon Need Tax Reform?' sponsored by League of Women Voters of Portland and St. David of Wales Episcopal Church, forum with Oregon Department of Revenue director Elizabeth Harchenko, tax and revenue legislative representative Joe Schweinhart, and Oregon Center for Public Policy executive director Chuck Sheketoff, 7 p.m., St. David of Wales Episcopal Church, Bishop Morris Hall, 2800 S.E. Harrison St. Call 503-228-1675.