I refer to the letter Global warming - getting the facts right.

Allow me to respond by citing five simple facts about global warming that are seldom heard.

1. According to the National Center for Policy Analysis , only 1~2% of the atmosphere is made up of greenhouse gases. Of that amount of greenhouse gases, only 3.62 percent of it is carbon dioxide.

And most significantly for proponents of anthropogenic global warming, only 3.4% of that carbon dioxide is emitted by human activity. That is to say, even if all human activities were immediately shut down tomorrow, 96.6% of the carbon dioxide would not be affected.

2. The wavelength of radiation that carbon dioxide absorbs is not only very narrow, it is also already mostly absorbed by other gases - such as the water vapour the writer mentions.

And this is also affected by the law of diminishing returns - once carbon dioxide and other gases absorb all this radiation, then adding more carbon dioxide does not have any effect - the radiation is already being absorbed in full. (Source: Page 13 of this PDF )

3. Historical data shows that temperature always rises first, followed 800 years later by carbon dioxide levels. This is the reverse of what global warming theory claims.

4. How is temperature measured, anyway? Nasa relies mostly on ground-based measuring instruments. However, many of them are placed in really stupid locations where they are exposed to a lot of temporary heat.

You should really take a look at the hilarious photos of temperature sensors placed in hot car parking lots, next to air-conditioner exhaust vents, inches from exposed light bulbs, and near flaming barbeque grills.

Don't you think this biases the temperature measurements towards the hotter end of the scale?

5. Global warming? What global warming? Where? Where? Does anybody even read the news anymore, or are they content to parrot decades-old talking points about melting ice caps and rising oceans? Extra credit to you if you know that:

• The oceans have been cooling since 2003. (Source: Nasa)

• Sea ice is growing at the fastest rate ever recorded. (Source: Arctic Research Center)

• Arctic ice is back to 1979 levels, meaning no net melting has occurred in 30 years. (Source: Daily Tech)

• The melting scare in recent years might have been caused by scientists having undermeasured the amount of ice by 500,000 square kilometers due to a sensor glitch, as they now bashfully admit. (Source: Bloomberg)

• Antarctic ice is at the highest levels ever recorded. (Source: Heartland Institute)

• The year 2008 saw colder temperatures across the United States. (Source: National Climatic Data Center)

• It snowed in Saudi Arabia during their coldest winter in 30 years. (Yes, it snowed in the Desert Kingdom!) (Source: Arabian Business.com)

• It snowed in Iraq for the first time in 100 years. (Source: Reuters)

• In 2009, it snowed in the United Arab Emirates for the second time in history. When was the first time? In 2004. (Source: Associated Free Press and Terra Daily)

• China had its coldest winter in 100 years. (Source: Reuters)

• Pakistan had its coldest temperatures in 70 years. (Source: The Indian Express)

• Australia had its coldest summer in 50 years. (Source: Bloomberg)

• Mumbai, India had its coldest winter in 40 years. (Source: India News)

• Takijistan, formerly part of the Soviet Union, had its coldest winter in more than 25 years. (Source: npr)

• There was record cold in Vietnam. (Source: Earth Times)

• A rare snowfall occurred in Jerusalem. (Source: BBC)

All this chill is probably why the fearmongers' language has gradually been shifted to 'climate change' instead of 'global warming'. So do tell me, how does the alleged carbon dioxide heating up the planet cause all this cooling climate change?

Finally, the writer insinuates that there are 'forces bent on denying the scientific evidence related to climate change', that is, 'businesses whose profits depends on humankind continuing unabated on this downward path, and the politicians funded by these businesses.'

Tell that to Al Gore, head cheerleader of global warming doom-saying - whose film 'An Inconvenient Truth' was officially ruled by the British High Court to be unscientific and one-sidedly political.

He whose house uses 22 times the electricity as the average American family and who has earned more than US$35 million in profits from his company Generation Investment Management LLP that sells carbon offsets.

Maybe that is why more and more people have felt that global warming is exaggerated since around the time 'An Inconvenient Truth' was released and why global warming is the currently the lowest concern on people's minds.

Don't naively believe everything a pundit claims. Heck, don't even believe what I am saying - go and check it all out for yourselves. All the above facts are backed up by citations from legitimate news sources that can be viewed here .