Yes, memory foam mattresses and mattress toppers are made from petroleum-based resources, but that means they're 100 percent recyclable. Since the foam is petroleum-based, it's easy to melt down and turn into other plastic and foam products. Some manufacturers will take back old mattresses (for free), and there are nationwide recycling centers that collect them. To find one near you, visit earth911.com.

Those fluorescent tube light bulbs that are common in many offices and industrial rooms of the house are energy efficient, but they contain a small amount of mercury, which can be dangerous, especially if one of the tubes breaks when you replace it. If a tube light shatters, have everyone (including pets) leave the room. Turn off the central heat (or air conditioning, depending on the time of year) so it does not recirculate the mercury-laden air. Use damp paper towels and large pieces of tape to pick up all the pieces, and place everything in an airtight container. Then tape the lid securely on the container and dispose of it in the trash. Then consider safer lighting alternatives, like LED bulbs, that are mercury-free.

Ever find those little silica gel packets when you buy something new, like a new computer, a wicker basket or even inside bottles of vitamins? They are designed to absorb moisture and protect items from rust, but they are also nearly impossible to recycle. The good thing is that they have a million uses around the house. Leave them in a box of old photos, baseball cards or any paper matter to prevent humidity from attacking printed items. Leave some inside toolboxes and camera bags to prevent rust on expensive equipment. If you save seeds to plant in the spring, drop a few packets in with the seeds to protect them from mold during the fall and winter months.