What evidence must support an environmental marketing claim in the United States?

A marketer must have a reasonable basis for every express and implied environmental claim before the claim is made. The current FTC Green Guides explain how qualifications should be clear and prominent and address claims such as carbon offsets, compostable, degradable, recyclable, recycled content and renewable energy; the guides inform enforcement under FTC Act section 5 but do not preempt stricter state law.