Plastic bag ban
Plastic bags also contribute to global warming. When they are exposed to the sun, they release two greenhouse gases,  methane and ethylene. Because they are thin, they break down more easily than other forms of plastics. At the end of a 212-day trial, emissions have been recorded at 5.8 nmol g-1 d-1 of methane, 14.5 nmol g-1 d-1 of ethylene, 3.9 nmol g-1 d-1 of ethane and 9.7 nmol g-1 d-1 of propylene.