“According to James Hansen, if we allow the Earth’s land‐based glaciers and ice sheets to melt, it will take many thousands of years for them to refreeze. However, to refreeze the floating polar ice would take only a fraction of that time. Whereas we have seen the stability of the polar ice decay in less than 60 years, it could refreeze again in a century or two ‐‐ but only if we cause the CO2 level in our atmosphere to return to a level where this could take place. This level should be at 350 ppm or lower, preferable below 325 ppm. Put another way, we should bring the Earth’s temperature back down to where it was in the early 1950’s.”

Our belief is that, in addition to bring carbon emissions to zero by 2050, we must also find a way to remove excess carbon from the atmosphere. Any projects of this sort, with global impact, should be government-financed and carefully monitored. All measures we draw down CO2 must be capable of moderation and adjustment, or, if necessary, elimination. Adding huge amounts of iron to our oceans, for example, could create a dangerous runaway effect of a different kind.

Thank you for the great contribution you’re making to raise global consciousness