Miss BumBum Contestants Bound to Trees ... for the Amazon, Of Course

Here are the Miss BumBum Brazil 2017 contestants gagged and bound to trees -- but it's for a good cause ... and not the one running around your head.

The models posed to raise Amazon awareness on the heels of Brazil's President giving mining companies access to a nature reserve in the rain forest.

This seems like a peaceful protest we can all get behind.