Ken, Greg, list:
First to Greg (re just earlier message) - I recognized CRD as a typo.
Thanks.
Yes to all of Ken's remarks below .
My additional point was that "we" (geoengineering list) do have one
company which claims the more you drive with their product - the more carbon
dioxide removal (more CDR). Both carbon neutral and carbon negative.. I only
know of one biofuel company with this claim. Surprisingly, not looking for
more capital, with small factories (refineries outputting a drop-in fuel)
leaving Colorado as soon as next year: Cool Planet. They are not in the "air
capture" category of CDR approaches.
Ron
On Aug 23, 2013, at 1:30 PM, Ken Caldeira <kcalde...@carnegiescience.edu> wrote:
>> "The transportation sector accounts for 28 percent of greenhouse gas
>> emissions in the United States, according to U.S. EPA, so there is still a
>> critical need for a way to reduce the overall carbon dioxide produced from
>> mobile sources."
>>
>
>
> There is a critical need to reduce carbon dioxide emissions from mobile
> sources. For the most part, the transportation can be electrified and the
> electricity sector can be decarbonized.
>
> The transportation power needs that cannot be met by electricity (e.g.,
> perhaps aviation) can be met by biofuels.
>
> If air capture of CO2 can compete with emissions reduction on cost (broadly
> interpreted), great. But to get near to zero CO2 emissions, there is no
> necessity for air capture.
>
>
>
>
> _______________
> Ken Caldeira
>
> Carnegie Institution for Science
> Dept of Global Ecology
> 260 Panama Street, Stanford, CA 94305 USA
> +1 650 704 7212 kcalde...@carnegiescience.edu
> http://dge.stanford.edu/labs/caldeiralab @kencaldeira
>
> Assistant: Sharyn Nantuna, snant...@carnegiescience.edu
>
>
>
>
> On Fri, Aug 23, 2013 at 11:38 AM, Ronal W. Larson <rongretlar...@comcast.net>
> wrote:
>
> On Aug 23, 2013, at 12:05 PM, "Rau, Greg" <r...@llnl.gov> wrote:
>
> Greg etal:
>
> This is to comment on a line in the EE report you posed, which said:
>> "The transportation sector accounts for 28 percent of greenhouse gas
>> emissions in the United States, according to U.S. EPA, so there is still a
>> critical need for a way to reduce the overall carbon dioxide produced from
>> mobile sources."
>>
>> I hope there are others, but the company Cool Planet <www.coolplanet.com>
>> is proposing exactly this. Perhaps surprisingly, their concept goes
>> beyond "reduce" (which it does); it also "removes" (via a co-product
>> biochar). This is a well-funded company, with aggressive expansion plans,
>> perhaps putting refineries in the field within a few years..
>
> Ron
>
>
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