
Originally Posted by
Rat Faced
I dont think any reputable scientist has ever said that Global Warming is caused by Human Activity.
The world has gone through a lot of Ice Ages and a lot of Tropical Phases, and will go through many more in the future (of Both).
What they have said, and shown, is that Human Activity has increased the rate of Global Warming to outside of the limits to what would naturally be expected.
It is a known fact that CO2, amongst other gases, has a "Greenhouse" effect. No one denies this, not even those that disagree about Global Warming.
However, although they agree that this is a "Greenhouse Gas", they then contradict themselves by saying that producing lots of it does not have the effect of a Greenhouse Gas....
Dont get me wrong...
Human Activity is not even the largest producer of Greenhouse Gases.. one large Volcanic Eruption produces probably around about the same amount as the annual output of an average industrialised country, there are plenty of natural causes too.
However, the way nature deals with CO2 is via plants, some produce the worlds Oxygen with it and some grow and store it... such as Trees.
When you kill a tree, you arent killing a net Oxygen producer (as some ill informed Greenies would say), you are however releasing the net total of CO2 that nature has stored in that tree back into the cycle.
We are therefor attacking from both sides:
On the one side we are contributing to the amount of Greenhouse Gases in the atmosphere, which contributes towards Global Warming. There is no way that anyone can deny that, so they dont, they spin the facts eg: "We arent the major reason" (we arent, not many people would say we are).
On the other, we are also destroying huge tracts of natures way of dealing with excess CO2 by destroying, as an example, the Rainforests. This also contributes to Global Warming both by the release of that stored CO2 (usually through burning, but even if just left to rot the Bacteria has the same effect, just much slower) and the fact that there are less trees to actually store the excess in.
Its quite Ironic that one of the best ways people can be "Environmentaly Aware" is by buying wooden furniture, made from fast growing renewable wood, and making the guys that cut it down re-plant. And also by having large Libraries of books at home... that way you are storing Carbon yourself and starting the cycle of naturally storing carbon again.
As Terry Pratchet would say... "lies to children" is the way that things are taught. ie: Teach them a generalisation with an easy solution.
Just like you learn something in Primary School (a simple rule of thumb), then find out that is not quite true in Secondary (Laws of Motion/Thermodynamics etc), then find that this is also quite untrue in University (Quantum Physics).
The trouble is with this methodology... when you have groups that have money involved to prove the opposite, its very easy to spin the facts in the opposite direction. Quite often both sides are correct in what they are saying based on the facts involved, but both sides only paint part of a picture.
Frankly, 99% of the worlds population would not understand the whole thing.. so its pointless confusing everyone trying to explain it all. They have to keep a very complicated thing very simple, to keep the public interest.
Its also a spin to say "This Glacier is growing, so Global Warming as false".
Frankly, with Global Warming.. some places will get hotter and some colder. The overall world temperature increases, not all the locals.
An example of this is the UK and the rest of North Western Europe.
Despite what it seems like now, with long hot summers that we arent used to... the actual effect are much colder Islands (and mainland) that will adopt the Climate of other regions in the world that are at our latitude.. eg: Siberia and Alaska.
This is due to the amount of extra fresh water in the Atlantic effectively turning off the North Atlantic Drift which brings huge amounts of warm water into our general area from the Caribean. This warm water keeps our winters mild and also our summers... remove it and we revert to the same climate as the other areas that do not have the drift.
VERY cold and VERY long winters and summers not really that much warmer.
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