Mosquito Control: The Best Ways to Effectively Combat MosquitoesWritten by All Mosquito Netting Info
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Like electric mosquito zapper, mosquito magnet is one of several mosquito traps that claim to best eliminate pesky insects. The mosquito magnet works by releasing a carbon dioxide spray, heat and moisture that mosquito mistakes for prey. Once mosquito gets too close to magnet, it is sucked in and eventually dies of dehydration. The mosquito magnet is run by a propane tank and can therefore be transported anywhere. This form of mosquito control is most expensive of all methods and there is no conclusive scientific evidence to support its effectiveness. You can find mosquito magnets here: www.mosquitomagnet.com.
There are a number of natural and chemical mosquito repellents that work to repel mosquitoes. The synthetic chemical repellent, DEET, is most effective. It is essentially a poison that masks natural odor and carbon monoxide that is released from human body. DEET must be used with caution, especially with children. It has been known to cause dizziness and can severely irritate skin. For these reasons, many people choose to use a natural mosquito repellent like a citronella spray. Citronella has active ingredients that repel mosquitoes and for some, lemon smell is very appealing. You can find mosquito repellent here: www.travelhealthhelp.com. Read more about mosquito repellents here: www.about.com.
Compliments of Mosquito Netting (www.mosquito-netting.com)
The Cost of Inaccurate CEM Calibration GasesWritten by Leanne Merz
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If CEM error rate due to calibration is, between 2% and 8%, then America’s acid rain utilities could be overstating emissions by 82,050 to 328,203 tons of SO2 each year. With SO2 current market value at $700 per ton, this results in $57,435,000 to $229,742,100 lost potential emission credits this year – with utility companies that use unacceptably inaccurate calibration gases, such as those produced by 43% of vendors who failed blind audit, bearing much of that loss.
The Cost of Inaccuracy
In order to fully understand significance of these numbers, imagine a utility company with a total SO2 Allowance Trading System (ATS) credit of 400,000 tons for one year, but which also used calibration gases that were actually 2% higher than tag value. That company would likely be overstating emissions by 8,000 tons (400,000 tons x 2%), which, at a value of $700/ton, means it would be losing over $5 million in allowance credits which could have been banked or sold that year. Companies using calibration gases bought from vendors who failed blind audit, and whose gases therefore exceed 2% accuracy requirement, stand to lose even more.
Such a gross loss of potential trading credits clearly overshadows higher initial cost of accurate CEM calibration gases. This year’s blind audit reveals scope of problem of inaccurate gases, and utility companies would do well to take notice. The companies could not see difference because they calibrated their CEMs based on tag values of these calibration gases. This problem is one which is only detectable after an annual or semi annual Relative Accuracy Test Audit (RATA) as mandated by EPA.
Leanne Merz is the Director of Technical Services for Scott Specialty Gases, the world.s largest producer of EPA Protocol gases and a leading global manufacturer of specialty gases for all types of applications. She can be reached by telephone, 800-21SCOTT. More information on the company and Scott's products can be found at http://www.scottgas.com .