The presence of drug residues in commercially sold fruit and vegetables has already been scientifically investigated many times. However, chemical substances from tire wear, so-called additives, also find their way into the food chain. The presence of drug residues in commercially sold fruit and vegetables has already been scientifically investigated many times. However, chemical substances from tire wear, so-called additives, also find their way into the food chain. Environment Phys.org – latest science and technology news stories