The article does indeed highlight fuels, as well as the other half of the equation… replacing the engines that use 100LL. There are alternatives, as the article suggests.
By the way, this article is scheduled to be published in the December issue of AvBuyer, which is dedicated to alternative fuels. As I write articles for AvBuyer, I took the liberty of posting a link to it here, inside the AvWeb ecosystem.
Hope it helps the discussion.