Here's an old wives tale worth disputing: Throwing glass in the trash can actually help break down garbage in landfills. The theory is that broken glass cuts through refuse, making it more efficient and compact. The verdict? False. Modern landfills are designed to be airtight and superefficient. Throwing away glass -- which is infinitely recyclable -- is not eco-friendly. All recyclable glass should be recycled in curbside bins, and nonrecyclable glass, like Pyrex cooking containers, donated to charities.