are cfcs still a problem?
474937
The atmospherically benign HFC refrigerants will remain in production, but CFC and HCFC refrigerants will be phased out. Production of CFCs ceased in 1995. ... Health Issues: CFCs and HCFCs are lighter than air, so they rise into the stratosphere, where ultraviolet light frees the chlorine.
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Although excessive sweating in itself is not known to be directly related to CF, anecdotally many people with the condition report having excessive sweating.
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CFCs do not easily react with other substances. In fact, they break up only through sunlight, which divides their molecules, causing the release of chlorine (Cl). Once the chlorine is released, it is able to react with ozone (O3), to form chlorine monoxide (ClO) and oxygen (O2).
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HFCs may not break down ozone in the same way that CFCs do, but they do indirectly contribute to ozone depletion: HFC emissions increase the warming of the stratosphere, which speeds up the chemical reactions that destroy ozone molecules.
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The environmental concern for CFCs follows from their long atmospheric lifetime (55 years for CFC-11 and 140 years for CFC-12, CCl2F2)9 which limits our ability to reduce their abundance in the atmosphere and associated future ozone loss.
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In 1987, the U.S. and about two-dozen other countries signed the Montreal Protocol, which agreed to phase out the use of CFCs. China ratified the treaty in 1991. According to CNN, a global ban on the use of CFCs has been in place since 2010.
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Their long lifetimes in the atmosphere mean that some end up in the higher atmopshere (stratosphere) where they can destroy the ozone layer, thus reducing the protection it offers the earth from the sun's harmful UV rays. CFCs also contribute to Global Warming (through "the GreenhouseEffect").
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CFCs are already known to deplete ozone, but in-depth statistical analysis now shows that CFCs are also the key driver in global climate change, rather than carbon dioxide (CO2) emissions. ... "In fact, the data shows that CFCs conspiring with cosmic rays caused both the polar ozone hole and global warming."
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CFCs do not spontaneously occur in nature. ... CFCs are generally non-reactive in the troposphere, the lowest layer of the atmosphere, but intense ultraviolet radiation in the outer layer of the atmosphere, called the stratosphere, decomposes CFCs into component molecules and atoms of chlorine.
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If too much freon is added, your air conditioner may not cool very well if at all. Too much freon can also damage the compressor,. The air conditioning in my car is extremely cold.
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Buy air-conditioning and refrigeration equipment that do not use HCFCs as refrigerant. Buy aerosol products that do not use HCFCs or CFCs as propellants. ... When motor vehicle air-conditioners need servicing, make sure that the refrigerants are properly recovered and recycled instead of being vented to the atmosphere.
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CFCs were used in aerosols, such as hairspray cans, fridges and in making foam plastics. The resulting ozone holes let harmful UV radiation in and add to the problems of the greenhouse effect and global warming, as the diagram below explains.
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In particular, HCFCs are now used as refrigerants (in refrigerators, freezers and air conditioning systems) and also in insulative foams. The use of HCFCs as solvents is now being phased out in developed countries and has been banned in the UK since 2001. Their use in general is also being phased out.
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Higher-Than-Normal Pressures Higher than normal pressures on both high and low side with the correct amount of refrigerant, could mean a problem with air flow thru the condenser.
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Whereas CFCs are safe to use in most applications and are inert in the lower atmosphere, they do undergo significant reaction in the upper atmosphere or stratosphere.
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Because they contain hydrogen, HCFCs break down more easily in the atmosphere than do CFCs. Therefore, HCFCs have less ozone depletion potential, in addition to less global-warming potential. HFCs do not contain chlorine and do not contribute to destruction of stratospheric ozone.
757879
It really depends on the unit. The vast majority of the units they have ever made are poor quality HEC built units. They have some newer Seasonic built ones and a few good new FSP built units, but the vast majority of their non-80+ gold units are bad.