The world is human person’s home, right? Thus we must look after the world.
This world is ours, and because of that we must take care of it.
Going down to a school level, when making an excursion with our students, we should put into them the eagerness for contemplation.
One clearer example: we will not allow the kids drop plastic bags or containers of food or cans of drinks. / Photo from: 2bigpeople blogspot com