California’s green claims laws combat “greenwashing” by prohibiting misleading environmental marketing, notably through SB 343 (restricting the chasing arrows symbol and recyclability claims to genuinely recyclable items) and AB 1305 (requiring disclosures for certain carbon offset and climate-related claims), supported by broader consumer protection laws like the UCL, CLRA, and BPC § 17580.5, holding companies accountable for unsubstantiated claims about being “eco-friendly,” “biodegradable,” or “net zero”.