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Scientists in the United States say they have discovered a new, inexpensive way to remove excess carbon dioxide, or CO2, from the atmosphere, as well as from large industrial exhaust sources, such as factory smokestacks.
Researchers at the University of Southern California's Loker Hydrocarbon Research Institute say their new CO2 extraction method achieved some of the highest rates ever reported for removing the potentially climate-changing greenhouse gas from the air under humid conditions.
Study co-author and Loker Institute director Professor Surya Prakash said the CO2 extraction technique involves a plastic-like substance dispersed in a sandy material called fumed silica.
Prakash says he expects to see his team’s CO2 recycling technology in commercial use within three to five years
The USC researchers say the fumed silica materials they developed for the CO2 extractor are much cheaper, more energy efficient and more chemically stable than existing extraction devices. They also report that the new materials can be used multiple times without losing their efficiency.
Originally posted by ZakOlongapo
CO2 is not pollution!!!!!!!!!!! U have to study more....
climatecooling.blogspot.com...edit on 7-1-2012 by ZakOlongapo because: (no reason given)
*Based on adding 1,500 ppm CO2 to a greenhouse
with one air change per hour CO2 production
slightly less when burning natural gas.
carbon dioxide in the Earth's atmosphere is at a concentration of 390 ppm by volume.
High carbon dioxide levels can cause poor air quality and can even extinguish pilot lights on gas-powered appliances.
High CO2 levels, generally over 1000 ppm, indicate a potential problem with air circulation and fresh air in a room or building.
The levels of CO2 in the air and potential health problems are:
250 - 350 ppm – background (normal) outdoor air level
350- 1,000 ppm - typical level found in occupied spaces with good air exchange.
1,000 – 2,000 ppm - level associated with complaints of drowsiness and poor air.
2,000 – 5,000 ppm – level associated with headaches, sleepiness, and stagnant, stale, stuffy air. Poor concentration, loss of attention, increased heart rate and slight nausea may also be present.
>5,000 ppm – Exposure may lead to serious oxygen deprivation resulting in permanent brain damage, coma and even death.