In 35:34 it says, "ולא תטמא את הארץ... אשר אני שכן בתוכה כי אני ה' שכן בתוך בני ישראל" - do not defile the land... that I dwell within it, for I Hashem dwell amongst Israel.
We live in a global village of sorts. Nothing we do is contained and limited to our own sphere of influence. Everything has an affect on the greater community.
Hashem says don't defile the land that you live in, because I live there too.
In other words, your actions do not affect only you, but other people as well. And Hashem as well. So when doing things, any thing, one must consider the ramifications of his actions, and not just the ramifications that will be to him, but how it will affect other people as well...