Archive for the ‘ Environmental ’ Category

Buy Wild-Caught Salmon to Avoid the Many Dangers of Genetically Modified Frankenfish

While Congress was in the process of reviewing a bill that would ban the interstate trade of genetically engineered fish (1), even further evidence of its prudence came to light. Researchers revealed that AquAdvantage, an artificial salmon and case study for this bill, was found to be contaminated with Infectious Salmon Anaemea (1).

This disease, which has been known to cause epidemics with a 90% death rate in salmon farms, is only one of the many ecological dangers that this fish could pose. The Atlantic salmon that this “frankenfish” is based on has already been shown to be a serious environmental hazard when it escapes from its farms along the Pacific Coast. According to one survey by the Canadian government, nearly 400,000 salmon were reported to have escaped into the wild between 1991 and 2001, from British Columbia alone. Atlantic salmon have been thriving in the Pacific ever since, competing successfully against local species, and more importantly, spreading the massive outbreaks of lethal sea-lice and disease that form in their cramped, unsanitary conditions.

Farmed fish are not a good idea for many reasons. Add in genetically modified farmed fish and it becomes a horrible idea. Farmed seafood (like conventionally produced beef and chicken) are held in pens that barely allow for movement. The conditions are incredibly unsanitary and stressful. All this contributes to weakened immune systems and rampant disease (the worst being sea lice). Of course, the commercial fish farmer responds by feeding the salmon a variety of pesticides and antibiotics which, we know, is bad for us and the environment. Additionally, farmed salmon have an unappealing grayish tinge because they never eat their natural diet of krill that give wild-caught salmon their natural, pink flesh. Again, the fish farmer counters this problem by feeding the farmed salmon a chemical called canthaxanthin which turns the flesh into a more appealing, albeit unnatural, shade of pink. In fact, the farmer can pick the exact designer shade of pink he wants his salmon. This chemical has been banned in the U.K. for causing eye problems in some exposed to it and was originally sold as a sunless tanning pill for humans.

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How Does Filtered Water Work?

In its simplest sense, a water filter is a mechanism that is used to remove water impurities thus making the fluid more potable for drinking and for other purposes. With the many hazards in the environment nowadays, especially water pollution, the industry of water filtration has indeed risen to a great popularity height so much so that even the business sector has seen its potential as an income-generating section.

Filtration as a process includes allowing the untreated water to pass through different methods that would filter its impurities. Most of these methods are actually very complex as they involve understanding of the chemical make-up of water-which surprisingly extends far beyond the widely known H2O. One of the popular filtration methods is sieving with a granular bed of sand. This is commonly referred to as slow sand filtration, where solid matters flowing together with the water is separated allowing the fluid to be stored in its cleaner form.

Reverse osmosis is another form of water filtration. This is used mostly for the purpose of recycling water as well as wastewater treatment. Technically, reverse osmosis refers to the process of desalination wherein saltwater is treated to become a substance adequate and potable for drinking.

Lastly, there is the so-termed multimedia filter. It works almost the same as a slow sand filter but the difference is that multimedia filtration includes the use of carbon material. Multimedia filtration has several processes that start with the compression of the carbon into a solid block form. Cleansing the water through multimedia filtration involves both physical and chemical processing. This means that aside from the removal of actual, tangible, physical dirt included in the water its chemical composition is also targeted to contain ions that are beneficial for human consumption.

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