I was looking through the Vesnali section of the achievements list and I saw there was one for the "Centropolis Green Project" and cleaning up the city dump. Where would I go for these events and how would I participate?

I think they were part of an event a few years ago and I don't think you can get those achievements anymore :(

is correct. The clean up project was part of a Vesnali event a few years ago. I'm not sure why they weren't retired.

maybe you guys can fix that? :D

So can we still get the Vesnali Champion achievement without the retired ones or is it impossible?