Here's a simple way to clean up a dirty secret in the shower: Choose bar soap over body wash. Liquid body washes are packaged in plastic bottles that, even if they are recycled, are still made from petroleum sources. Also, the No. 1 ingredient in body wash is water, which adds significant weight to the package, requiring more fuel to ship it from the factory to the store shelves. Even if the body wash is an all-natural or organic brand, bar soap has it beat as the greenest choice.