It's not about going vegan, starting a garden or using condoms. If a person is already exhausted personal efforts (to the extent one can with a given life condition), where can we help by directly investing.
Because I'm a working professional with solid income, maybe I don't have time/space to do the time-consuming activities proposed, but I do have excess funds that I can direct to the higher cause.
So - where should we invest our money, and not our time? Because we possible have the first, and not the later :(