&gt; &quot;Think what needs to happen on the world stage in order to enact a global ban (1) on oil pumping and coal mining within 20 years. That&#x27;s the job.&quot;<p>You could aim for that, or you could aim for a steady stream of improvements leading to larger change once momentum is built. Or in other words, revolution vs. evolution. If you want to pursue revolution, go for it, I&#x27;ll continue to  pursue evolution.