Participating in your local recycling program is a great first step toward reducing waste, but tossing your old containers in the right bin is just one part of the process. To make sure your recyclable goods end up where they're supposed to be, you have to treat them right. That means resisting the urge to crush your aluminum cans, according to Lifehacker.
Stomping on an empty can may seem like a logical move: A crushed can takes up less space, which should make it easier to store and recycle. But recycling centers actually have a harder time processing cans that have been flattened.
Many recycling plants sort recyclable materials by shape. Small items tend to be marked as waste and sent to the landfill (which is why it's better to leave caps on plastic bottles when you recycle them). Flat items are usually sorted with the paper and cardboard, so when a can is crushed, it may be misidentified and end up contaminating a batch of paper items.
If you want your aluminum cans to be sent to the right place, leave them in their original 3D shape when you dispose of them. That way your local recycling center will have an easier time identifying the material. But if crushing cans has become a habit, you may be able to keep doing it without creating more waste. Some municipalities use multi-stream recycling systems which are able to recycle your cans properly no matter what shape they're in. So, if you use two separate bins for your recycling and live in a multi-stream recycling area, you can probably continue crushing cans to your heart's content.