Post: People start pollution. People can stop it.

On Earth Day, 1971, a nonprofit called Keep America Beautiful launched TV ads to persuade people to stop littering.

Apps we like: Epicurious

Great recipes (zillions of them) – and in-app advertising done right.

Back in the web 1.0 days, Conde Nast put all of the recipes from Gourmet and its other food magazines online at http://epicurious.com. The recipes were searchable and over time Epicurious added ratings and other community features.

It’s been a fabulous resource for cooks. They are great recipes, and there are lots of them – including the 1955 recipe for steak au poivre that keeps me from going vegetarian.

Epicurious has now come to the iPhone with the free “Epicurious recipies and shopping list” app http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=312101965&a… .

That whole recipe database is now searchable from your iPhone. And, yes, it will make a grocery list from the recipes you pick.

• search the entire Epicurious recipe database -- from the phone
• see how other Epicurious users have rated the recipes
• save favorite recipes
• generate a shopping list from the recipes you pick
• check off items as you buy them
• price: free