LMTC said:
I'm not going to take the time, but anyone who is interested can find information (and you other "old-timers" probably recall) that in the 60s the then-equivalent of the whatever-pseudonym-you-prefer for those who seem to always have something they need to stop mankind from doing were telling us that by 2000 the world would be overpopulated to levels that would leave us with mass starvation and disease. Later in the 60s and early 70s we were facing another imminent ice age from the nuclear winter that was going to occur when we rained down atomic havoc on the globe. No nuclear winter, and the only starvation we have is politically induced (i.e., food is withheld or prevented from getting to a region). Plenty of food around the globe (again...I acknowledge distribution of it to be an issue, but that is from political influences in the places where people are starving), and no nuclear winter.
How does any scientist know what the blazes things were like thousands of years ago? A thousand years ago "science" insisted the earth was flat. "Science" said leeches would cure disease. "Science" has been repeatedly and routinely trumped by new information, which makes what was "science" now just bad information..not just old information, but often wrong.
Wow...that pretty much leaves me speechless.
Nuclear winter? I don't think that's currently a problem since mankind figured out that it wasn't a great idea to detonate large quantities of thermonuclear devices above ground...North Korea not withstanding.
As for the question "How does a scientist know anything?"
Let's just for the sake of argument look at one discipline, physics.
There was Ptolemy, then Galileo and Newton, then Einstein. Each improved on the other's theories. Like Einstein said, he stood on the shoulders of giants, each improving on the other's theories. Were any of these scientists "wrong"? (Is anyone ever right?)
Do you drive a car or ride in an airplane? Do you believe man went to the moon? Do you own an air conditioner? See a physician on a regular basis? Are you on the Internet right now?! Well you must have some faith in the veracity of the fields of aerodynamics, classical Newtonian mechanics, thermodynamics, quantum mechanics and the list goes on...
Back to global warming...who of us knows the effects of releasing several million years worth of stored up carbon into the atmosphere in the span of a hundred years? Well, I've read a lot of posts on the subject of global warming here, and I suspect none of you have ever been published in any peer-reviewed journals like Nature or Science or the International Journal of Modern Physics.
I think the last people that I would believe to be qualified to talk about atmospheric science and climatology would be James Inhofe or Michael Crichton or Al Gore or Al Franken or, sorry, anybody on TBN.
So, can't we just go back to talking about tractors and the weather?