When sourcing eco-friendly products, you must verify specific certifications to avoid 'greenwashing.' Key standards include GRS (Global Recycled Standard) for products with recycled content, FSC (Forest Stewardship Council) for wood and paper items, and GOTS (Global Organic Textile Standard) for organic fabrics. For the EU market, ensure compliance with REACH and RoHS to guarantee the absence of hazardous substances. For compostable items, look for ASTM D6400 (US) or EN 13432 (EU) certifications.