1) The document discusses learning from an exercise in generating 50+ ideas for making Bikram yoga, which is practiced in a hot room, more sustainable.
2) Key learnings included focusing first on unlikely ideas, leaving the ego at home, and testing solutions with users as their perceptions may differ.
3) The problem of interest is how to reduce the environmental impact of Bikram yoga by decreasing energy usage and waste from heated rooms and sweaty towels/clothes. The design thinking process of empathizing, defining problems, ideating solutions, prototyping, and testing with users will be applied.