GoodGuide iPhone app helps you find eco-friendly products

The GoodGuide iPhone app offers ratings of environmental impact for thousands of consumer products. This free app covers 50,000 products and even allows you to scan barcodes while shopping.

When you search for or scan a product contained in its database, the GoodGuide gives you a number between 1 and 10 for that product, 10 being the most environmentally friendly. It then breaks that number down into ratings for health, environmental and social impacts. It also provides you with "Behind the Rating" details about why that product earned its rating.

Of course these things are hard to quantify, and no doubt arguments could be made against specific ratings, but it's good to see someone at least trying to provide shoppers with a tool they can use to evaluate the environmental impact of the products they're putting in their carts and taking home to their families.