There are several videos posted on the Week Two Videos page, and they all touch on the idea of wicked problems. For this week's discussion forum, watch those videos, and then do a Google search for "wicked problems in x" where "x" is your public policy area (environment, education, etc.). In your post, first define a wicked problem and then discuss 2-3 wicked problems that you discovered in your search.
https://youtu.be/wXYSsA5yVSY
TEDTalk by Vasiliki (Vass) Bednar, Making public policy more fun (07:20)
https://youtu.be/_vS_b7cJn2A
TEDTalk by Tom Wujec, Got a wicked problem? First, tell me how you make toast (09:05)
https://youtu.be/o4tbM59_75s
Bill Gates Foundation, The wicked problem of school funding (03:33)
Sample Solution