> I hope they extract valuable Thorium and Uranium from the coal ash before > dumping it in the > sea.http://www.reuters.com/article/pressRelease/idUS131671+03-Mar-2008+MW... > > One wonders if "ashcrete" sea ridges can sequester more CO2 than is produced > in their construction life-cycle, or what the CO2 payback time would be (not > to mention cost per ton CO2 equivalent sequestered). Using coal combustion > and cement production to grow marine plankton seems a little fishy. > -dl
*Ok well you're right but its not the ashcrete that helped with the CO2 sequestration, my point was with the mounds that caused the water flowing around it to cause an upheavel of the water and caused the nutrients to rise. The guys point in using the ashcrete was that it was waste and that had already been produced and he was trying to find use for it, but maybe like you said, raises questions. The last part of the article stated this although I didn't post it previously.* ------------------------------------------------------------------------- However, two structures being built in Nagasaki Prefecture are public works projects, and rock is being used instead of ashcrete blocks. Suzuki was left shaking his head at the decision. "Using rock excavated from mountains instead of recycling waste means the project is no longer environmentally friendly," he said. "It's time to think about producing food in the ocean, rather than on land. I believe the project's importance lies in the fact that we'll be able to secure food resources and reduce CO2 at the same time-- problems the world is facing today," he added. (Jan. 1, 2008) ------------------------------------------------------------------------- *But here's what I was getting at with the whole OIF thing and this is good, proof from French and U.S. researchers of why OIF will work.* ------------------------------------------------------------------------- Genome of carbon-capturing marine algae sequenced [Date: 2008-10-16] A study led by researchers in France and the US has sequenced the genome of the diatom Phaeodactylum tricornutum, a kind of microscopic algae that thrives in oceans and captures atmospheric carbon. Diatoms are essential components of oceanic carbon sinks, and produce approximately 20% of the oxygen we breathe. This study has contributed greatly to our understanding of how they work. The findings, which are published online by the journal Nature, came out of an international collaboration funded in part by the EU's Sixth Framework Programme (FP6). Diatoms are photosynthetic organisms that live in marine and freshwater environments. They have been around for approximately 180 million years, and hundreds of thousands of diatom species exist today. The study compared the genome sequence of Phaeodactylum tricornutum, which can be grown easily in a laboratory, with that of another recently sequenced diatom. The team will focus next on the role of iron in the suppression of photosynthesis and nitrogen assimilation. Dr Bowler proposed that because diatoms capture carbon dioxide so efficiently, and because iron is so precious in marine environments, one strategy might be to use iron to provoke massive diatom blooms. 'Once they have feasted,' he explained, 'the weight of their silicon shells, which resemble glass, causes the diatoms to sink to the bottom of the ocean when they die, and the carbon that they assimilated is trapped there for millennia. 'By sequestering carbon in this way we could reverse the damage from the burning of fossil fuels,' he said. The collaboration included partners from 10 countries and was funded in part by the EU-funded DIATOMICS and Marine Genomics projects. For more information, please visit: Nature: http://www.nature.com/nature Marine Genomics Network of Excellence: http://www.marine-genomics-europe.org/index.php DIATOMICS: http://www.biologie.ens.fr/diatomics/ --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups Global Change ("globalchange") newsgroup. Global Change is a public, moderated venue for discussion of science, technology, economics and policy dimensions of global environmental change. Posts will be admitted to the list if and only if any moderator finds the submission to be constructive and/or interesting, on topic, and not gratuitously rude. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/globalchange -~----------~----~----~----~------~----~------~--~---
