If you read the article carefully it accelerate tumor growth but it's doesn't cause cancer it act synergistically with other carcinogenic: Through its tumor

If you read the article carefully it accelerate tumor growth but it's doesn't cause cancer it act synergistically with other carcinogenic: Through its tumor promoter effects, it acts synergistically with other carcinogens from automobile exhausts or wood burning and potentially shorten the induction period of cancers. That difference is subtle and past a certain age that difference is meaningless.