FishingBanter - View Single Post

**Old Guy** · March 13th, 2007, 11:21 PM posted to rec.outdoors.fishing.fly

wrote:
On Mar 13, 12:46 pm, Ken Fortenberry
wrote:
wrote:
That didn't answer my questions (what amount of CO2 is
generated from natural vs human sources), but I'll look at the URL.
I don't know, but if the historical, all-time high before the
industrial age is ~300 ppm and there is now 379 ppm (and growing)
I'd venture a wild guess and say some of it anyway.

I'm certain it's "some of it". I'd feel better if I knew relative
percentages.

Another question for you in the meantime: If global warming
started after the industrial revolution, why did the glaciers
begin receding before then?
Natural causes ? I'm just guessing.

Yeah, that's not very comforting. If the glaciers have been
receding for 150-200 years, but CO2 has only started
increasing the last 40 years is it possible that you are
attacking a symptom and not the cause of the warming?
- Ken

Glaciers have been receding for longer than 200 years. Exit Glacier
near Seward, AK has a record of glacial positions that extend far down
the valley toward Resurrection Bay. The glacial positions noted extend
back more than 500 years.