Enviroscore

Enviroscore is the measurement of a planet's environment developed at the University of Megaladon. It ranges from 0-100, with planets at 100 being uninhabited.

Levels

 * 0-10 - 600 billion to 500 billion inhabitants
 * 10-20 - 500 billion to 400 billion
 * 20-30 - 400 billion to 300 billion
 * 30-40 - 300 billion to 200 billion
 * 40-50 - 200 billion to 100 billion
 * 50-60 - 100 billion to 1 billion
 * 60-70 - 1 billion to 900 million
 * 70-80 - 900 million to 5 million
 * 80-90 - 5 million to 10,000
 * 90-100 - 10,000 to uninhabited