Having already gone full-out with their new Rainforest theme (which has taken over the Outdoors store), PetVille enacted a modest release for Earth Day featuring 3 posters and 2 sets of recycling bins. You'll find these in the Furniture store on Floors 1 (Living Room), 2 (Dining Room), and 4 (Home Office). Floors 1 & 2 contain the same items.
The 3 posters -- 1) Recycle, 2) Keep It Green, and 3) Live Green Love Green -- are 10 Pet Cash each, and pretty underwhelming in design. The recycling bins in the Living Room and the Dining Room are called Chrome Bins and go for 3,500 Coins each.
On the 4th Floor, in the Home Office, we've got 4 regular, plastic-looking recycling bins in bold primary colors. Unlike the Chrome Bins, these have symbols to visually designate them for Bottle, Paper, Can, and Compost recycling. These go for 2,000 Coins each, and definitely look more fun than the Chromes.