The logo for the Rio+20 conference was a mystery for me, so I asked a friend, who has a lot of knowledge about occult symbolism, what the logo means. This is what he said:
"The top part is the male - female union, then the masonic steps with the lowly chattel (slave) below. So it says, "When you reach the top of the masonic staircase, you will have balanced your male and female energies. While all those who are not initiated will be sacrificed [by fire/blood]. This is why the man is in red.""Fear them not therefore: for there is nothing covered, that shall not be revealed; and hid, that shall not be known... And fear not them which kill the body, but are not able to kill the soul: but rather fear him which is able to destroy both soul and body in hell." Matthew 10:26 + 28