Lilly, Thailand's Greta Thunberg, wages 'war' on plastic Skipping school to glide through a dirty Bangkok canal on a paddleboard, Lilly fishes out rubbish in her mission to clean up Thailand, where the average person uses eight plastic bags every single day. The US-Thai youngster started campaigning at the age of eight after a seaside vacation in southern Thailand where she was horrified by a beach covered in rubbish.