yes try not to buy chinese food, its not real chinese food, and it is usually full of msg, sugars and salts and hydrogenated fats, its not very good for you... but if you have to eat it, ride your bike for a pick up and bring a bunch of tupperwares for them to put the food in instead.
yes littering is bad, even in cities where it gets cleaned up it is just plain disrespectful to the earth.