I don't drink milk, but I do love me some cold, bottled water! At my school, there are recycling bins specifically made for plastic bottles located in the cafeteria, letting me recycle.
My school bus loop has signs letting the bus drivers know to turn off their engine to reduce the number of harmful chemicals released into the air.
Turn off your engine
I live with 2 siblings (most of the time), and my two parents. It's a lot of laundry! We still manage to only do laundry every 2 weeks with clothing lasting us the time between. This helps us save freshwater that animals need to live.