Confused as to which colored bin you should put your waste? Don't fret! Here's an A-to-Z guide to help you out.

Aluminum and metal items, like steel, aerosol cans, and foil, are recyclable. Place them in the blue bins. When recycling aerosol cans, like hairspray and spray paint, make sure it's empty.

Batteries are recyclable and should be dropped off at designated battery recycling locations, including the battery section at the SFSU Bookstore.

Cutlery including plastic plates, forks, spoons, knives, and coffee lids are recyclable. Place them in the blue bins.

Drink cans are recyclable and go in the blue bins.

Electronics nearing the end of the life, such as radios, cell phones, and bricked PSPs, can be recycled at designated locations, including Green Citizen located at 591 Howard Street in San Francisco.

Food scraps, including meat, bones, and pits, are compostable. Gather food scraps in a paper container and place them in the green bin.

Glass bottles and containers are recyclable. Place them in the blue bins. Broken glass should be gathered in a plastic bag then placed in a box labeled "broken glass".

Homework and other class work from previous semesters, if done on paper, are recyclable. Place them in the blue bin. Spiral notebooks and plastic binders can be recycled as well without detaching its metal parts.

Ice cream cartons and other paper food are compostable and go in the green bins.

Junk mail, including those mailed in windowed envelopes, is recyclable and go in the blue bins.

Keys are recyclable and go in the blue bins.

Light bulbs are recyclable if they are energy efficient light bulbs. Place them in the blue bins. Old incandescent bulbs are not recyclable and go in the black trash bins.

Musical instruments are readily recyclable because of the different types of materials that are used to make them. Consider Freecycling them to your local community. Visit www.freecycle.org for more information.

Napkins and food-soiled paper plates and cups are compostable and go in the green bins.

Oil filters are recyclable at designated locations only, including Kragen Auto Parts located on 7283 Mission Street in Daly City.

Plastic bottles, cups, plates and cutlery, and coffee lids are recyclable. Place them in the blue bins. Plastic #2, #4 and #5 tubs, bins and lids are also recyclable. Plastic #3, which includes shrink wrap, PVC pipes, and liquid detergent containers, is not readily recyclable. Plastic bags, including those from the grocery store, dry cleaners, and package wraps, are recyclable at designated locations only. Some plastic bags are labeled compostable. Drop off recyclable plastics bags at the National Recycling Corporation in Oakland.

Questionable items should be checked against a list of recyclable items before being placed into a bin. Visit www.recyclenow.com for more information.

Rat poison, pesticides, and other toxins are considered hazardous and should be disposed of properly at designated locations, including SF Recycling and Disposal located at 501 Tunnel Avenue in San Francisco.

Shredded paper is recyclable and should be placed in a paper bag with the label "shredded paper" and go in the blue bins.

Tea bags and coffee grounds are compostable and go in the green bins.

Universal waste, such as pesticides and mercury-containing thermostats, are considered hazardous and should be disposed of properly at designated locations, including SF Recycling and Disposal located at 501 Tunnel Avenue in San Francisco.

Vegetables and fruits are compostable and go in the green bins.

Wood scraps and small pieces of lumber or sawdust (no plywood, pressboard, painted, stained, or treated wood) are compostable and go in the green bins.

Xerox paper, newspapers, and other types of paper are recyclable and go in the blue bins. When recycling, be sure to keep the paper clean and free of food

Yahoo drink cartons and other aseptic packaging, including juice boxes and soy milk cartons, are recyclable, but only at designated locations. Call 1-800-888-6488 for a list of aseptic recyclers.

Zines (magazines) and phonebooks are recyclable and go in the blue bins.