MUST See YouTube (2 min.): A million grains of rice help demonstrate why it's insane to get all worked up about trace amounts of CO2

YouTube - CO2 Contributed by Human Activity: 12 to 15ppmv / version 1

Feeling guilty about your carbon footprint? You understand percent, which could be called parts per hundred. You're almost there to understanding parts per million, which is the way trace gases are described. You are in for a big surprise! [Via Climate Realists]