Earlier quoted context omitted.
What you or I, or even Gates do in our personal lives has absolutely no effect on climate change. Solutions or failures happen in other contexts. Gates does some real work in those. The whole "I must recycle all my plastic bags or the planet will die" mentality is, to me, a weird form of delusion of grandeur. Seeing past that can be both freeing and depressing :)
I think you miss that one persons effort if collective done has an impact. So if everyone recycles or lowers their energy use it has impact. However if one person doesn't, that in and of itself won't change the trajectory, however if everyone did it would. I'm sure there is some kind of name for this.
How does it happen that everyone, on average, recycles or uses less energy?
In general, by making non recycling or energy use more expensive. This can come from regulation, taxes, social pressure. Technical innovation can also sidestep whole issues by using less energy/materials and/or producing more. Maybe there are a few other paths.
Those things actually make a difference. Focus on them.