I would like to see a chart of CDR proposals, with one axis being estimated cost per ton, and the other being certainty/likelihood. If anyone knows of such, please let me know.
Brian On Sunday, August 20, 2017 at 5:26:43 AM UTC-4, Schuiling, R.D. (Olaf) wrote: > > Well, the message is clear, but when I propose the most scalable and > proven process, and probably the cheapest way, not many people seem to > listen. So again: > > 1:The weathering of olivine (and some similar rocks as well) has made life > possible on Earth > > 2: Life itself (mainly marine life), by practically storing all CO2 as > limestones (made up of the calcite skeletons of corals, shellfish and > plankton) has provided a huge storage capacity for CO2. Carbonate sediments > contain about a million times all the CO2 in seas, the atmosphere and the > biosphere together. > > 3. The needed additional storage capacity because we burn in a few hundred > years all the coal, oil and natural gas that has taken hundreds of million > years to form can be found in mining, milling and spreading olivine at > locations which make rapid weathering of olivine possible, like tropical > countries with high rainfall, or beaches with a strong surf, where coarse > olivine grains can be dumped. These grains will collide in the surf, by > which small slivers of olivine are knocked off. We have shown that thee > slivers often are already weathered within ten days in the saline water. > > 4. There are much more olivine massifs at the Earth’s surface than we will > ever need to rebalance the input and output of CO2. These massifs can be > mined in open pit mines. In order to minimize transport costs, such olivine > mines should be strategically spread over the Earth and care can be taken > to spread their locations in such a way that developing countries profit > from the employment provided by the mining exploitation. > > 5. Spreading olivine grains can be done in such a way that other > advantages of this spreading can also be used. > > 6. Olivine is the most common mineral on Earth. > > I think that developing many, mostly unproven technologies to counter > climate change is silly, as we have a natural process that has proven its > validity during 4.5 billion years, Olaf Schuiling > > > > > > > > > > *From:* geoengi...@googlegroups.com <javascript:> [mailto: > geoengi...@googlegroups.com <javascript:>] *On Behalf Of *Greg Rau > *Sent:* zondag 20 augustus 2017 1:22 > *To:* geoengi...@googlegroups.com <javascript:> > *Subject:* [geo] It’s time to start talking about “negative” carbon > dioxide emissions > > > > > > https://www.vox.com/energy-and-environment/2017/8/18/16166014/negative-emissions > > > > "...it’s time for governments to start implementing policies that > incentivize the development of carbon removal technologies. And not just > one-off pilot projects, either, like the one that is *spectacularly > failing in Mississippi* > <https://www.vox.com/2016/7/5/12098504/kemper-ccs-problems-clean-coal>, > but the kinds of policies that will build up an industry that can expand > into gigatons. Just demonstrating that the technology can work is no longer > enough. Time to think about scale." > > GR - esp, thinking beyond land biology. > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to geoengineerin...@googlegroups.com <javascript:>. > To post to this group, send email to geoeng...@googlegroups.com > <javascript:>. > Visit this group at https://groups.google.com/group/geoengineering. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at https://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
