Here's a bit of real science:
1) Solar irradiance tied to the sunspot cycle is the primary determinant of global temperature change; we are heading into a period of decreased activity and solar irradiance that will result in global cooling.
SCIENTISTS PREDICT SOLAR DOWNTURN, GLOBAL COOLING
New Scientist magazine, 16 September 2006
HYPERLINK "http://www.newscientist.com/unpwlogin.ns" \t "linkWin"
SCIENTISTS PREDICT SOLAR DOWNTURN, GLOBAL COOLING
It is known as the Little Ice Age. Bitter winters blighted much of the northern hemisphere for decades in the second half of the 17th century. The French army used frozen rivers as thoroughfares to invade the Netherlands. New Yorkers walked from Manhattan to Staten Island across the frozen harbour.
Sea ice surrounded Iceland for miles and the island's population halved. It wasn't the first time temperatures had plunged: a couple of hundred years earlier, between 1420 and 1570, a climatic downturn claimed the Viking colonies on Greenland, turning them from fertile farmlands into arctic wastelands.
Could the sun have been to blame? We now know that, curiously, both these mini ice ages coincided with prolonged lulls in the sun's activity - the sunspots and dramatic flares that are driven by its powerful magnetic field.
Of course any farmer could tell you that a strong sun warms things up.
2) 2008 has recorded a significant drop (app. 0.65 degrees C, or more) in global temperature, in line with a decreasing temperature trend since 2000.
CRU Information Sheet no. 1: Global Temperature Record
3) The greenhouse signature is missing. Weather balloons have scanned the skies for years but can find no sign of the telltale hot-spot warming pattern that greenhouse gases would leave. Something else caused the warming.
Are Carbon Emissions the Cause of Global Warming? - David Evans - Mises Institute
Greenhouse Signature Missing 2007
Second crucial point, August 2007: There are several possible causes of global warming, and they each warm the atmosphere at different latitudes and altitudes that is, each cause will produce a distinct pattern of hot spots in the atmosphere, or "signature." The greenhouse signature is very distinct from the others: warming due to greenhouse would cause most warming in the tropics at about 10 km up in the atmosphere:
4) The 800 or so year gap between the initiation of global warming and increases in CO2 (from ice cores covering app. the last 600,000 years) indicate that CO2 does not cause warming.
CO2 Science
Ice Core Studies Prove CO2 Is Not the Powerful Climate Driver Climate Alarmists Make It Out to Be
Volume 6, Number 26: 25 June 2003
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5) The greenhouse effect of adding CO2 to the atmosphere is a function of percentage composition; as the percentage rise, the greenhouse effect diminishes.
Cold Facts on Global Warming
The arithmetic of absorption of infrared radiation also works to decrease the linearity. Absorption of light follows a logarithmic curve (Figure 1) as the amount of absorbing substance increases. It is generally accepted that the concentration of carbon dioxide in the atmosphere is already high enough to absorb almost all the infrared radiation in the main carbon dioxide absorption bands over a distance of only a few km. Thus, even if the atmosphere were heavily laden with carbon dioxide, it would still only cause an incremental increase in the amount of infrared absorption over current levels. This means that a situation like Venus could not happen here. The atmosphere of Venus is 90 times thicker than Earth's and is 96% carbon dioxide, making the atmospheric carbon dioxide concentration on Venus 300,000 times higher than on Earth. Even so, the high temperatures on Venus are only partially caused by carbon dioxide; a major contributor is the thick bank of clouds containing sulfuric acid [7]. Although these clouds give Venus a high reflectivity in the visible region, the Galileo probe showed that the clouds appear black at infrared wavelengths of 2.3 microns due to strong infrared absorption [8]. Thus, Venus's high temperature might be entirely explainable by direct absorption of incident light, rather than by any greenhouse effect. The infrared absorption lines by carbon dioxide are also broadened by the high pressure on Venus [9], making any comparison with Earth invalid.
Fig.1. Transmitted light is a logarithmic function of concentration. This curve is the familiar Beer's Law.
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