On Jun 8, 10:42Â am, Lynn McGuire <
l...@winsim.com> wrote:
> Yes, I totally believe in Climate Change. Â I do not
> believe in man made Global Warming however. Â The
> Earth has cycles of warmth and cold.
That's true. But burning fossil fuels puts carbon dioxide in the
atmosphere that wouldn't otherwise be there. The greenhouse effect is
very simple physics - the Earth isn't as hot as the Sun, so while the
Sun radiates energy to us as light and short-wave infrared, the Earth
radiates heat back to space as long-wave infrared.
Greenhouse gases in the atmosphere, therefore, slow down the Earth
giving the heat it receives from the Sun back to space. We have to
radiate it all back to stay the same temperature, thus, this changes
the Earth's equilibrium temperature, how hot the Earth has to be to
radiate as much heat into space as it gets from the Sun.
We've already gotten enough warmer that the polar bear is threatened
by grizzly bear interbreeding. Enough carbon dioxide has been taken
out of the atmosphere by the oceans, delaying global warming, that the
Great Barrier Reef is threatened.
And in several parts of the world, permafrost is thawing, threatening
to release trapped methane from bogs that will promote a larger
greenhouse effect.
> We are currently
> in a warm cycle and I pray that it stays that way. Â We
> can take more warm (in fact the evidence says that
> the Earth was probably 4 to 6 F warmer about 1000
> years ago). Â However, we cannot take much colder.
> 4 to 6 F colder on a global scale would be a total
> disaster.
Here in Edmonton, Alberta, it is true that warmer weather doesn't look
all that bad. Any change in weather patterns, though, could bring
droughts in some places and flooding in others. The main danger, long
before the ice caps of Greenland and the Antarctic melt - which could
happen eventually, and which is the disaster scenario getting the most
attention - is that many tropical areas will become too hot to grow
the crops that the people there know how to grow.
In today's world, national borders, although not inviolable, are
obstacles to migration. Massive famines in tropical countries are a
likely consequence of even modest climate change.
> And even if there was man made global warming, what
> should we do about it ? Â Getting the entire planet to
> cut back on CO2 production is not going to happen.
Getting the entire planet to cut back on _energy use_ indeed does seem
like something that is "not going to happen".
> And conversion to nuclear energy is not going to
> happen anytime soon. Â The new TVA nuclear power plant
> is currently scheduled to go online in 2015 and I
> suspect that will be the last nuclear power plant
> built in the USA for decades, maybe a century.
If you have three alternatives, A, B, and C, and alternatives A and B
mean global disaster, and alternative C avoids it, but is objected to
by some people because of misinformation and hysteria, what do you do?
You choose alternative C.
All that's needed is for both the Democratic and Republican parties to
support legislation that streamlines the approval process for nuclear
power plants - by however much is necessary. For example, they could
all be owned and operated by the Department of Defense, and thus be
fully exempt from all state and local regulations whatever.
Then start building them. Everywhere fossil fuels are used now to
produce electricity.
Also, a program of low-interest long-term loans to finance people
converting their houses to use electricity rather than gas, oil, or
coal for heat.
Also, cities replace their diesel buses used for public transit with
trolley buses which use electrical power, generated by nuclear power
or hydroelectricity.
And gas rationing, so that people may still use their cars to go on
vacations, but everyone commutes to work by public transit - which, as
noted above, all runs off electricity, without any fossil fuel use.
Sure, people will gripe, but it is not impossible to cut CO2 emissions
significantly without sending us back to the dark ages. What would be
much more difficult, and I hope we can avoid it, would be requiring
people to cut down on meat consumption (methane from animals) and
running tractors and combines without fossil fuels.
Replacing most _overland_ airplane use by high-speed electric trains
is something that could have happened anyways because of 9/11.
Crossing the oceans, though, whether by 'plane or ship, requires
fossil fuels - oh, wait a moment. Reactors have been used to power
both submarines and aircraft carriers, so, assuming that political
obstacles prevent people going from New York to London by taking a
train across the Bering Strait Bridge and then through the Channel
Tunnel (they _have_ that one, now), we _do_ have a means of
intercontinental transport without fossil fuels.
The passenger ships would just be run by the military - thus providing
the security the lack of which prevents us from driving around in the
equivalent of the Ford Nucleon.
If New Zealand still objects, I suppose people can take a nuclear
cruise ship to Sydney and then go by *sail* from Australia to New
Zealand.
John Savard