Browse by Category
Explore our encyclopedia organized into thoughtful categories. Each one holds a world of knowledge about sustainable practices.
A warm, community-driven guide to understanding recycling — from everyday materials to the future of sustainability.
Explore our encyclopedia organized into thoughtful categories. Each one holds a world of knowledge about sustainable practices.
Understanding the journey from your recycling bin to a new product. Tap each step to learn more.
Materials are gathered from homes, businesses, and drop-off centers.
Curbside collection is the most common method in urban areas. Recyclables are placed in designated bins and picked up on scheduled days. Many communities also operate drop-off centers and buyback programs.
Single-stream collection allows all recyclables in one bin, while dual-stream separates paper from containers. Each method has trade-offs in contamination rates and sorting efficiency.
Materials are separated by type using both manual and automated methods.
At a Materials Recovery Facility (MRF), recyclables pass through screens, magnets, eddy currents, and optical sorters. Paper and cardboard are separated first by spinning star-shaped screens.
Modern MRFs can process up to 35 tons of material per hour. Human sorters still play a crucial role in quality control.
Sorted materials are cleaned, broken down, and prepared for manufacturing.
Each material undergoes unique processing. Paper is pulped in water, screened for contaminants, and de-inked. Plastics are shredded, washed, and melted into pellets.
Recycling aluminum saves 95% of the energy needed compared to virgin production.
Processed materials become new products, completing the recycling loop.
Recycled materials are sold to manufacturers who turn them into new products. Recycled paper becomes newspapers, tissue, and packaging. Recycled glass becomes new bottles within 30 days.
The circular economy thrives when consumers choose products made from recycled content.
Dive into our most popular and recently updated encyclopedia entries.
Those little numbers inside the recycling triangle on plastic products tell an important story. Known as Resin Identification Codes (RIC), they range from 1 to 7 and indicate the type of plastic resin used.
#1 PET — Found in water bottles and food containers. Widely recyclable and commonly turned into polyester fiber.
#2 HDPE — Used for milk jugs, detergent bottles, and grocery bags. One of the easiest plastics to recycle.
#3-5 PVC, LDPE, PP — Varying levels of recyclability depending on local infrastructure.
#6-7 PS, Other — Generally difficult to recycle and often end up in landfill.
Composting transforms kitchen scraps and yard waste into nutrient-rich soil amendment. It is one of the most impactful things you can do at home.
What to compost: Fruit and vegetable scraps, coffee grounds, eggshells, yard trimmings, leaves, and shredded newspaper.
Getting started: Choose a bin or designate a corner of your yard. Layer browns and greens, keep it moist, and turn it every few weeks.
What to avoid: Meat, dairy, oils, and pet waste can attract pests and create odor problems.
Electronic waste is the fastest-growing waste stream globally, with over 50 million metric tons generated annually. Only about 20% is properly recycled.
Why it matters: E-waste contains valuable recoverable materials and hazardous substances like lead, mercury, and cadmium.
What you can do: Many electronics retailers offer take-back programs. Look for R2 or e-Stewards certified recyclers.
The bigger picture: Right to Repair legislation is pushing manufacturers to design products that last longer and are easier to recycle.
The zero waste movement inspires, but perfection is not the goal — progress is.
Start with the Big Four: Reusable bags, water bottles, coffee cups, and food containers eliminate a huge percentage of single-use items.
Buy in bulk: Bring your own containers to bulk stores for grains, nuts, spices, and cleaning products.
Repair before replace: Learning basic mending and maintenance skills extends the life of products significantly.
Contamination is the silent killer of recycling programs. When non-recyclable items end up in the recycling stream, they can cause entire loads to be sent to landfill.
Common contaminants: Food-soiled paper, plastic bags, ceramics, and wish-cycling — tossing items in the bin hoping they are recyclable.
The ripple effect: A single contaminated item can ruin an entire batch. Grease from a pizza box can make tons of recyclable paper unusable.
Best practices: When in doubt, throw it out. Rinse containers, keep recyclables dry, and check your local guidelines.
recycle.wiki is built by passionate people like you. Contribute articles, correct facts, or simply share your recycling wins.
Share your expertise. Write new articles, improve existing ones, or translate content into other languages. Every edit makes the wiki better.
Start contributingGet weekly recycling tips, new article highlights, and community updates delivered straight to your inbox. No spam, ever.
Nominate someone making a difference in recycling and waste reduction in your community. We feature local heroes every month.
Nominate someone