City Slickers?

One the one hand, it's good news that 45 of the US's 100 biggest metro areas have pledged to cut emissions of 'greenhouse gases'. On the other hand, 55 currently haven't (https://www.theguardian.com/cities/2021/nov/19/us-cities-working-reduce-emissions). Any reduction in carbon emissions is worth having. It's suggested that the Climate Action Plans of the 45 'white hat' cities will (if, of course, they actually happen) generate savings equivalent to taking 79 million conventionally-fuelled cars off the roads. To avoid a climate crisis, however, everyone needs to get their act together. The worry is that the US still appears split down the middle. If 80 of the US's 100 biggest metro areas had Climate Action Plans, that would put pressure on the remaining 20. The almost 50:50 split pressures nobody. Political changes could even result in some Climate Action Plans being dropped?