It is as you say unfortunately true that we do not focus only on what a
paticular approach does but unfortunately also how it is characterized. In
human affairs such approaches result in discriminations of all kinds. It is
truly a sad day to see the science community and the climate policy
apparratus legitimize, in fact practice such discrimination in their
dialoques and decision making. I personally find those that introduce
concepts like moral hazards are particularly agregious in distorting our
efforts to make informed decisions matched only by climate deniers. I for
one think we should all hold the line on focusing on what are the cost and
benefits of diffferent decisions. Use our rapidly growing understanding
and knowledge where we have them and acknowledging uncerrtainty where it
Now I do realize that the best we can likley do is to resist the
generalizations that labels bring . On the issue of carbon removal there
is one perspective missing in your analysis .
One of the distinctive properties of CO2 is that it distributes itself
uniformly and so removing a CO2 molecular by flue gas capture and by Direct
Air Capture have identical impacts - and are thus both pure mitigation
approaches . The only distinction is that DAC can remove CO2 that was
previouslly emitted by flue gas so it has the additional capability to deal
with overshoot. In this frame DAC is clearly not geoengineering any more
than any human activity is geoengineering because as allknow too well small
emissions by individuals when there are billions of us is geoengineering
our plant by changing its climate .
So I encourage us all to fight generalizing this complicated challenge we
face by not practicing it ourselves. Instead lets all focus on the
specifics -eg why does SRM have a greater risk of unintended consequences
than for example DAC and why does SRM deal with the sympto of climate
change while DAC deals with the core problem. Those are the real reasons to
favor DAC over SRM and not because one is geoengineering and the other is
Thanks for your effort to promote this important dialoque
On Fri, Feb 23, 2018 at 7:59 AM, Mark Turner <markalistairtur...@gmail.com>
> A thought piece raising the questions we are asking ourselves in C2G2.
> Geoengineering? Mitigation? Something else altogether?
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