Americans throw away 49 million diapers every single day. But what happens after the garbage truck takes them away? The diapers end up in landfills and could take 500 years to decompose. Styrofoam takes 2,000 years to decompose. And plastic bottles—such as all of those water and soda bottles—will never decompose.
So what does that mean for global warming? Landfills emit toxins such as methane and carbon dioxide, which just so happen to be the two main greenhouse gases that some scientists say cause global warming.