Core Meaning:

Materials that break down naturally into carbon dioxide, water, and organic matter through the action of microorganisms (bacteria, fungi, etc.), leaving no harmful residues. This process may occur in home compost piles or industrial facilities.

Key Distinctions:

1. Industrial compostable: Requires controlled high-temperature facilities (typically 55–60°C+) to decompose within weeks, common in certified packaging (e.g., cornstarch-based takeout containers).
2. Home compostable: Breaks down in backyard compost bins without specialized equipment, such as plant-fiber-based utensils.

Note:

"Compostable" ≠ "biodegradable." Regular plastics labeled "biodegradable" may fragment into microplastics, while compostables fully integrate into ecosystems.

Uses:

Disposable cutlery, food wraps, and garden mulch, replacing single-use plastics in eco-conscious brands like Whole Foods or Starbucks’ compostable cups.

Core Meaning:

The process of collecting, sorting, and processing waste materials to create new products, reducing reliance on virgin resources.

Typical Process:

1. Collection: Curbside bins, drop-off centers, or retail take-back programs (e.g., TerraCycle, grocery store plastic bag recycling).
2. Sorting: Automated systems or manual sorting (e.g., separating PET bottles from HDPE jugs via resin codes).
3. Processing: Shredding, washing, and melting (plastics) or pulping (paper) to form recycled raw materials.
4. Remanufacturing: Turning recycled materials into new goods (e.g., recycled aluminum cans, post-consumer recycled cardboard).

Challenges:

Contamination (e.g., food residue on plastic) and downcycling (e.g., plastic bottles becoming fleece, which can’t be recycled again).

Core Meaning:

Products designed for multiple uses instead of single disposal, extending lifespan to cut waste.

Environmental Logic:

Reduces the resource footprint of single-use items (e.g., one reusable stainless-steel bottle replaces 500+ plastic water bottles yearly).

Common Examples:

1. Daily use: Cloth grocery bags (replacing plastic), glass food jars, and refillable coffee cups (popularized by chains like Pret A Manger’s "bring your own cup" discounts).
2. Industrial: Reusable shipping pallets, returnable glass soda bottles (still common in European countries like Germany).

Definition:

Short for "recycled polyethylene terephthalate," a material made by recycling post-consumer PET plastics (e.g., soda bottles, water bottles).

Production:

Waste PET is cleaned, shredded into flakes, melted, and reformed into pellets or fibers.

Uses:

1. Textiles: RPET fiber is widely used in activewear (e.g., Patagonia’s recycled polyester jackets) and carpets.
2. Packaging: Recycled PET bottles (for non-food items) or food-grade RPET packaging (certified safe for snacks, juice boxes).

Benefits:

Cuts plastic pollution (critical for ocean conservation efforts) and reduces petroleum use—each ton of RPET saves ~7 barrels of oil.