Pilots, cabin crew and passengers are inhaling air that could be tainted with toxic chemicals, often without awareness, impacting their health and the safety of flights.
Should rivers be given legal rights like humans? A Bristol campaigner is testing the waters of British law in an effort to protect the Avon from further pollution.
Lead-glazed pottery in Mexico is the main source of lead poisoning - and a million children aged one to four have elevated blood lead levels as a result.