martin luther king did wat was supposedly wrong, bob marley smoked and changed the world, marijuana has helped many countries become very peaceful (ex. holland, amsterdam, sweden, ect.)

explain to them that u smoke it and when ur done... well thats it.
explain to them that u dont smoke b/c u hate ur life, explain to em that u dont smoke b/c u think its cool, tell em u dont smoke to impress ppl, tell em its not effecting your life, and most importantly TELL THEM U R NOT GOING TO STOP. ***dont be a little smartass and argue with them, just be very calm and speak to them in an adultlike manner, and if done correctly i guarantee that they mite still be against it but they understand u better and def. respect u much more and think of u as finally a real adult.