Originally posted by: Fern
Is Global warming real, and are we the responsible?
I, like some others here, am of the opnion that the Earth does go through climitoligical (sp?) cycles. Whether or not any current cycle will prove significant is, IMHO, still an open question. When I was much younger science was certain we were facing a cooling trend, not a warming trend like now.
I have lived through so much, "butter is bad, margerine is good", no wait "margerine is bad, butter is good" type scientific reversals I remain doubtful that they have the ability to accurately gauge/forcast such trends. I.e., I really doubt the scientific community has "cracked" the all the complicated "secrets" of the Earth. Time has taught me to be very sceptical of anyone who says they have.
Are we the cause? Notwithstanding the above question, I do not find it hard to belive that we humans have some effect, the unresolved question in my mind is "how much"?. We (humans) tend to overestimate our presence in every possible way, and underestimate the impact of natural forces. I am doubtful our impact is as great as claimed, and doubtful of the ability of present day science's to both accurately identify all factors involved in any changes as well as understand the complexity of the interrelationships of such factors.
It was much simpler when I was in college. I just believed in what the "experts" taught us.
Fern
I'll get tired of repeating this eventually, but not yet.
-yes, the earth undergoes cycles.
-no, what we have today is not a cycle, its a spike caused by the industrial revolution.
http://en.wikipedia.org/wiki/Image:Carbon_Dioxide_400kyr.png
If you'd like to disagree, please:
-provide a counter example (show that this isn't a human-caused spike but a natural event)
-provide an alternate explanation (something that explains the spike, but doesn't involve humans)
-revise your view to fit the accepted one.