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Show Sunday, kkrth 18. DAILY HE! AID 2007 Continued from B9 absorb carbon dioxide from the air. Another chemical reaction tiny scale, Lackner decided to would take the carbon from the look at doing it globally. absorbent material, and then a third process would change Newty inspired by the $25 million prize offered by Richard that greenhouse gas into a form that could be disposed of. Branson, Lackner has It would take wind and a lot the idea. He wants to develop a large filter that would of energy to power the air cap i the size of a television, could remove about 25 tons of carbon dioxide a year, which is about bow much one American produces annually, Lackner sail The captured carbon dk oxide would be changed into a liquid or gas that can be piped away from the air capture ture devices. They would stand tal Eke eel phone towers on steroids, reading about 200 feet high with various-size- d square filers at the top. Lackner envisions perhaps placing 100,000 of them near wind energy turbines. Even if each filter was only fine-tun- ed 19 4 . al Enginesirliig a crteir plansfc Scientists are put torncontemplating forests of art&cW ranging underground, often in old oi wells or deep below the sea floor. The Bush Administration, which doesn't like many gecngineering ideas, is spending hundreds of millions of dollars an carbon sequestration, but mostly for power plant devices. . Disposal might be the biggest cost, Lackner said. Disposal of carbon dioxide, including that from fossil fuel plant emissions, is a major issue of scientific and techno-kicresearch called sequestration. The idea is to bury it emissions. Solarsai-- -- ton that would reduca carbon dkmde emissions to triRons of stnal cfsks Inapaoafhataclas an umbrela to block tie stars heat paytaad of 800,0rxftyera deployed over one year One-to- n a Thin refracsve screen Sun ; J tstewUld Trie V j Mock 1 6 oawet High-altitu- Solar umbrella Proposal: In 20 mon launches, deploy 16 trfcn refracting disks in orbit between the Earth and Current commercidi systems sua sulfate particles wouM last up to two years in the stratosphere Problems: Cost could be $4 trillion; no effect on carbon dkvode. - Resulting I currently stored sodum I I jsdBsoVsd and lushed through tree :' Pivots : captured I 197 feet I Voicsno stiffs!; . Coal plant tons of can reduce C02 emissions up to 90 percent per Idowatt hour, but tw waste is not j Troposphere 20 Slats baftoon For every ton of iron ore dumped into the ocean, 100,000 tons of C02 would be absorbed by the resulting I J Sulfur dioxide and ash from volcanoes reduce solar radiation and cool the troposphere. jf ... Oi platform Volcano effect ' ' Drawrngsamschamafc It is then transported to processng X, '"A : center Proposal: Using and artOery to put rriKons of tons of sulfates in the stratosphere to mimic the cooing effects of a volcanic eruption. Problems: Expensive; tens of thousands of batons, jet engines pounds needed per C02 i hi month to produce enough cooing; no ft i.twiMiiri ii ii Photosynthesis is stored energy from tie sun in plants that consume carbon cfoxide and release oxygen. effect on carbon ctaride; could cause drying of the Mediterranean and the Mideast Carbon capture and sequestration Proposal: Capture C02 from photosynthesis Proposal: Dump iron ore Artificial tree Proposal: Use industrial size artificial trees to fitter major emission sources and discard them into salt formations, coal beds, depleted dust into the ocean to create an algae bloom which would absorb carbon cfoxide and sink. Problems: Could change sea temperature which would affect local species; political indications in international waters. oi and gas reserves or the OissoMng C02 in tie ocean, or pooling in depths below 9,800 feet wl keep I tsotated for 100 years. Burying at depths below 800 feet wil retain 1 for t 1,000 years. ocean. Problems: Expensive; leakage a risk to humans, ecosystems; entire volume of ocean may C02 is captured in the slats of the artificial tree with a sodium hydroxide iquid and sent to a processing taakty to be converted into a gaseous farm before it is stored. measurably change. 90,000 tons of carbon dioxide from the wind per year. Each tree can fitor 6.6 pounds of C02 per second. Problems: Separation, transportation and (Ssposal costs are high; leakage a risk to humans, ecosystems. SOURCES: Inlsrgovemmentd Psnel on Cfimato Change; NASA; Roosr Angst, Urmraty Arizona. Stmran) ObMrvaby: Paul J. Crutom, tor Chsmefry; Klaus LKlinar, Columba Unmraiy Scnpps tnsdMe of Oosanography, UC San Ongo and AndyFowts-A- P -i irmMmr Straivbcrrics 1 v 7 f 'jvhble or $l'.zeC i9 tor V While supplies , Fresh Celery s. ..00 L m lb. Consumer Back While supplies last last VVh7e supplies '"v'':"! rc': .0;(. : Vv,::;"', ..'.W ;lvt; r.:i.-:-i Russet lPotatoes ,'. f mAP per bag While supplies last ! 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