I've done exactly that. I've done my part by actively deciding to not have children. By doing so I've stopped the creation of an entire tree of exponential huma

I've done exactly that. I've done my part by actively deciding to not have children. By doing so I've stopped the creation of an entire tree of exponential human population growth in the form of my (lack of) descendents. It's unquestionably the most effective way an individual can reduce the negative impact of humans on the planet. Your humorous implication that suicide would be effective has some merit, but only for individuals who have not reproduced already.