We're at like 12% renewable. The journey from 12% renewable to 30% renewable will be different than the journey from 90% to 100% renewable.

The tools in our disposal to reach 20% or 30% are available today, if we can understand them. And also, as long as we don't let perfection be the enemy of good.

We will probably never tackle the 90% to 100% problem in our lifetime. It is best to focus upon the problems that are in front of us, and that we can in fact solve or fix within our lives.