Here is the answer
you: iam saddened by a fact that our class mates do not switch off lights and fans while leaving the class room to go to the playground.
partner: yes they even do not bother to turn the running taps in the wash rooms.
you: i have decided to take a presentation in a class how much water and electricity we waste daily and give them concrete figures of how many houses can get water and electricity if we are not wasteful
partner:great idea.let us also arrange a screening of the movie to swades where it is shown that views of the developed part of society are so far removed from reality.
you: iam sure that the classmates will give us a positive response.let us choose a monitor specifically for fining anybody who leaves the tap running or the lights on