This looks very interesting indeed! Cloudflare observed that 53% of 'good bot' traffic is wasted (ie. search bots) and finding a solution to reduce that wastage could save as much as 26 million tonnes of carbon cost per year!
They introduced a solution: Crawler Hints. Crawler Hints proactively tell a search engine when a page has changed, rather than having to wait for the search engine to discover a change has happened. Find out more!