Most experts agree that we need to get to negative greenhouse gas emissions worldwide by the year 2050 in order to stave off the most catastrophic effects of climate change. It's a colossal challenge, but despite a lot of outright cynicism, it is possible. This is not a problem that can be solved halfway, however, or even 95% of the way. Yet no proposal is currently on the table that specifically addresses the full scope of solutions. This is why we need Solomon Goldstein-Rose's book, The 100% Solution.