Sustainability in man

What am I, when?

This sentence struck me when describing sustainability at CBS:
“Sustainability is therefore also about responsible handling of the natural environment.”
Two elements stand out to me:
1 responsible handling
Is that valid for every situation; Do we adapt to different situations?
2 natural environment
A living environment consists of different biotopes, are these different situations and do those
circumstances result in different responsibilities?
Contradiction and Similarity
I want to show how people in different circumstances are different, but also the same. Maybe also
show the unknown side of themselves.