O+ 1 in 3 <span>37.4%
</span>O- 1 in 15 <span>6.6%
</span>
O- can receive O-
O+ can receive O+, O-
O can receive<span> O, A, B, AB</span>
Some examples would be slate, phyllite, and gneiss.
Energy is interrelated on Earth; people need to manage Earth's natural resources to meet current and future needs that effect the entire planet.
Hope that helped!
