Science, Sustainability

Carbon dioxide emissions don’t cause global warming

In April, KLM had an interesting exclusive in-flight documentary on global warming which I happened to watch.

The documentary goes on to present that man-made CO2 emissions do not cause global warming. It states that earth’s present temperature increase is driven by the sun and not by human activity. A few points presented in the documentary are:

1. CO2 is not the major green house gas. Its concentration change has been too small to explain such major temperature differences. Oceans can emit 180 billion tons of CO2 tonnes of CO2 where as human activity emits only about 7 billion tons. It is argued that water vapour and methane are bigger influences than CO2.

2. Earth has seen decades of temperatures which were significantly higher and and also significantly lower. But the ice did not ever vanish completely.

3. Changing of the size of the polar ice caps is explained to be a normal thing which happens routinely with temperature even between summer and winter.

4. Earth’s temperature is more closely related to solar activity and is known to have had a very good co-relation with it for centuries.

5. Change in CO2 concentration in the polar ice caps is an effect of change of earth’s temperature and it has a 800 year lag. This 800 year year lag is the time required for the temperature of the oceans to change to release or absorb CO2.

6. Earth’s temperature continued to drop from 1940 to 1970 when the economic activity boomed. The present upward trend lasts from only 1970.

7. Yet another observation was that the change in temperature profiles of the earth’s atmospheric layers did not seem to support increased green-house activity.

8. The model used to predict the global climate has several hundreds of assumptions on which not all experts seem to be in agreement. Clearly, a model can only be as good as the assumptions that go up to make it.

The documentary goes on to state that the IPCC report is driven by considerations that are non-scientific and serves to retain several jobs which were created by the billions of dollars funded to study this.

Those who are closely following the global warming issue must be already aware that there is a clear second opinion on the need to limit the emissions from developing countries in order to reduce global warming.

One can’t help but wonder if the entire global warming tale is fabricated by an energy thirsty group of nations who are using misleading pointers to prevent the developing nations from creating a stronger demand for energy.

That documentary was an eye-opener to me.


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