Here is another blog carnival. As you can probably tell, blog carnivals are communities of bloggers that get together and aggregate their stories into a given theme. There are different approaches, but one common approach is for a different person of the community to host it on their blog each time. Readers and bloggers are asked to make recommendations for the best content to be linked into the carnival.
Carnival of the Green 20 is hosted at Greener Magazine.
I believe that this carnival is always hosted at Greener Magazine.