The earth's ecosystem can sustain a certain level of carbon emissions each year. That level, the planet's 'Carbon Ceiling' is currently around 15 Gigatonnes of CO2. At the moment however, our carbon emissions are around double that amount – meaning we'd actually need 2 whole planets to sustain them.

It's obvious that on a global level we can't maintain these emissions without major problems, but at what level does Menzies play a role? The illustration below tells us exactly that.