A couple weeks ago mosquitos were at their peak in my yard. I started thinking about adult mosquito traps, but I don't love the idea of using propane as a CO2 source like most commercial solutions do. I casually looked into solar powered direct air capture of CO2, but that would not scale down. Then I realized maybe I could just capture my own exhalations for 30 minutes a day to use in a trap. Not sure I'll ever actually implement it.