[benj111]

Agreed, but that isn't science.

You could use it as a prompt to start doing more research to see if there actually is less snow. I'm not sure what else you could do with that information though, a tool for raising awareness of climate change?

Photos are better, they're useful for things like measuring glacier retreat. But even in your example there would be issues, if snow becomes noteworthy more people will take photos of it, so already you can only be confident of looking at the most extreme examples.