NotNow wrote:
Calif Bill wrote:


When one reviews all the data, both from thermometers and
paleotemperature proxies, it becomes clear that the Earth has
warmed significantly over the last 140 years; Global Warming is a
reality. Multiple paleoclimatic studies indicate that recent years,
the 1990s, and the 20th century are all the warmest, on a global
basis, of the last 600, and most likely 1200 years. It appears that
the global warming of the last century is unprecedented in the last
1,200 years.
The peer review does not address man causes for global warming.
Earth has heated and cooled for it whole life. What did man do to
cause the last Ice Age about 15,000 years ago? The mini ice age 500
years ago? And the warming afterwards?
It does not matter what has happened and how it happened in the past.
We are talking about the CURRENT situation. That's why the right's
insistence that it isn't man made is non-think.

Now the past does not matter in global warming and history does not
enter into science. I am not sure I want you engineering a building
for me. You would ignore codes, etc as they are based on history.


Uh, no not really. Codes are based on known strengths, stresses,
strains, etc. And you use the CURRENT code. Using your analogy, you'd
want me to design by a standard that was a few million years old.

If the past does not matter you have no basis to say there is global
warming. Yesterday, last week, last year, last decades' temperatures,
don't exist therefore there are no temperatures to compare today's
temperature, so it can not be increasing