We don't know what the other half would pay, but if we assume that $10 is the average everyone above 18 in the US, ie aprox. 260,000,000 people is willing to gi

We don't know what the other half would pay, but if we assume that $10 is the average everyone above 18 in the US, ie aprox. 260,000,000 people is willing to give per month, it means aprox. $31,200,000,000 more for preventing climate change per year. This sounds not too bad for a start.