301. Wearing shorts into Forensics.298. Wear shorts into Experimental Design (my partner did this at regionals and caused us to get 4th, we were about to be disqualified).
Iron is a limiting nutrient in the ocean, so adding it will cause phytoplankton to grow quickly (bloom). They'll photosynthesize and remove CO2 from the atmosphere that way. The bad part comes from when all the algae die and cause hypoxia instead.