The barefoot physicsist.

I thought that in these modern times the idea of being environmentally aware was fairly common, and even if we don't all actively participate in trying to single handed stop climate change, most people are conscious and sympathetic of the issue. But just the other day i was laughed at and mocked for suggesting a small environmentally minded activity.
It was in the physics lab. We had just spent half an hour waiting for the x-ray diffracting machine to take the readings and we were analysing the data. I will not bore you with the details but it involved graphs and finding the peaks. We had six peaks and needed these values, and upon finding that how to display these values the conversation went a little something just like this:
Other physics student 1: "So can we print this somehow?"
Me; "Or we could just copy them down, you know, save some paper..."
Other physics student 1: "why?"
Me (with puzzled look) : "to not waist paper, save some trees..."
Other physics students 1 & 2: *laughter*
There was six values! and we had already printed the graph of the spectrum (which we had to do twice each as 'other physics student 1' and some how messed the first one up). They then printed 3 copies, one for each of them, of a table that took up about a tenth of each sheet and continued to mock me for not wanting a copy. Other physics student 3 is my friend but was no help at all.
I really did not expect to be laughed at for that.