> we have those already and it hasn't really changed anything

What’s the term for antibiotics having been so successful that we forget all their benefits?

The Montreal Protocol worked [1]. It probably couldn’t have without our satellite data.

[1] https://en.wikipedia.org/wiki/Montreal_Protocol

Disagree about the change. Even the fact that you know and care enough to argue this on-line is a change that can be attributed to space missions - and it's even more true about the overall global conversation about climate situation, and all activities taken to help with it.

These things do take time though.