Hey Duke,
Sorry it took a while to get back to this but I've had family things.
"I also hear that global warming preachers have switched over from complaining about smog and pollution in the atmosphere since the air is now cleaner and there is less reflection of the sun because of this. CFC's have lost focus to C02, and this will soon be replaced by the next factor."
As we all know, time marches on. Scientists, and regular people, recognize problems and either do something about them, or not. If you may remember, back in 1952, and then again in 1969, the Cuyahoga River in Ohio actually was afire due to pollutants. That helped lead to the 1972 Clean Water Act. Water quality has gotten better (and is now generally potable but there are some nasty little secrets out there, I personally don't drink tap water without several layers of filtration).
CFC's (freon) were developed in the 1930's but by the 1970's scientists were able to demonstrate that freon was able to migrate to the stratosphere and help destroy ozone. The US banned its use by the late 70's and most of the rest of the world quit using it by 1996. This doesn't mean that the CFC's are not still up in the atmosphere doing their thing, it just means that we've quit contributing to the problem and that some day the CFC's will be gone.
Smog is still a problem in several areas around the world. Ever been to LA or Mexico City? Its better than it used to be (in LA) but its still a problem (and maybe more than we realize, asthma rates are still on the rise). California has done more to try and curb this problem than anyone, but as is very apparent to those that live there, they haven't done enough.
"and this will soon be replaced by the next factor."
Correct. Time marches on. We recognize a problem and we deal with it or we don't. Here's a bit about one of the next big things (I mentioned water quality a bit earlier).
Back in the early 80's I spent about a year working for an independent water quality lab. We tested ground water and effluents of all kinds for business, governments, landfills, etc. Shortly after I got there we bought a new technology called a GCMS (gas chromatography/mass spectrometer) which was able to precisely show us what chemicals, and what concentrations, were present in a given sample. What was found was pretty alarming to those in the lab that knew a heck of a lot more about the subject than I did. Just for fun they tested the tap water. All of them went out and bought home water treatment systems.
Back then, and even today, when a chemical is produced, it is tested for possible effects on biological organisms (that was not done prior to the 1970's). But the chemical is tested all by itself. What happens in the real world though is different (as became apparent to me when collecting samples at landfills and paint company waste storage facilities). Chemicals mix! And what happens to biological organisms when they do and then are injested by that organism?
Today, we know a little but not a lot. In fact it is only within the last year or so that a small group of scientists have started looking at the problem. What will they find? Too early to tell. Could this be the reason that industrialized countries have higher cancer rates? Maybe, time will tell.
Enough for now. Now my head hurts.
Sorry it took a while to get back to this but I've had family things.
"I also hear that global warming preachers have switched over from complaining about smog and pollution in the atmosphere since the air is now cleaner and there is less reflection of the sun because of this. CFC's have lost focus to C02, and this will soon be replaced by the next factor."
As we all know, time marches on. Scientists, and regular people, recognize problems and either do something about them, or not. If you may remember, back in 1952, and then again in 1969, the Cuyahoga River in Ohio actually was afire due to pollutants. That helped lead to the 1972 Clean Water Act. Water quality has gotten better (and is now generally potable but there are some nasty little secrets out there, I personally don't drink tap water without several layers of filtration).
CFC's (freon) were developed in the 1930's but by the 1970's scientists were able to demonstrate that freon was able to migrate to the stratosphere and help destroy ozone. The US banned its use by the late 70's and most of the rest of the world quit using it by 1996. This doesn't mean that the CFC's are not still up in the atmosphere doing their thing, it just means that we've quit contributing to the problem and that some day the CFC's will be gone.
Smog is still a problem in several areas around the world. Ever been to LA or Mexico City? Its better than it used to be (in LA) but its still a problem (and maybe more than we realize, asthma rates are still on the rise). California has done more to try and curb this problem than anyone, but as is very apparent to those that live there, they haven't done enough.
"and this will soon be replaced by the next factor."
Correct. Time marches on. We recognize a problem and we deal with it or we don't. Here's a bit about one of the next big things (I mentioned water quality a bit earlier).
Back in the early 80's I spent about a year working for an independent water quality lab. We tested ground water and effluents of all kinds for business, governments, landfills, etc. Shortly after I got there we bought a new technology called a GCMS (gas chromatography/mass spectrometer) which was able to precisely show us what chemicals, and what concentrations, were present in a given sample. What was found was pretty alarming to those in the lab that knew a heck of a lot more about the subject than I did. Just for fun they tested the tap water. All of them went out and bought home water treatment systems.
Back then, and even today, when a chemical is produced, it is tested for possible effects on biological organisms (that was not done prior to the 1970's). But the chemical is tested all by itself. What happens in the real world though is different (as became apparent to me when collecting samples at landfills and paint company waste storage facilities). Chemicals mix! And what happens to biological organisms when they do and then are injested by that organism?
Today, we know a little but not a lot. In fact it is only within the last year or so that a small group of scientists have started looking at the problem. What will they find? Too early to tell. Could this be the reason that industrialized countries have higher cancer rates? Maybe, time will tell.
Enough for now. Now my head hurts.