6 Quitting plastic drinking straws. They’re basically pointless and very damaging to sea life. 7. Nappies. Don't use non-biodegradable disposables. They cause such bad landfill issues that some local councils in the UK are now offering parents up to £50 cashback on reusable nappy purchases. And a shocking number of them end up in the sea. Picking used nappies off coral is possibly one of my least favourite things ever.