This is fun:
For example, temperatures dropped steadily from the late 1940s to the late 1970s. The popular press was even talking about a coming ice age. Ice ages have cyclically occurred roughly every 10,000 years, with a new one actually due around now.
In the late 1970s, the natural cycles turned warm and temperatures rose until the late 1990s, a trend that political and economic interests have tried to milk mercilessly to their advantage. The incorruptible satellite measured global atmospheric temperatures show less warming during this period than the heavily manipulated land surface temperatures.
If the science discussed in that article is correct, we can expect a couple more decades of cooling.
There are natural forces that change our climate which overwhelm human activity. So sure, when natural factors--like the long-term retreat from the Little Ice Age and the periodic changes in ocean effects on climate--warm the climate, human addition of CO2 to the atmosphere adds to the warming.
But when natural forces cool the Earth, human factors are negated. If not, we wouldn't see these fluctuations since the late 1940s, eh? It would all be warming with perhaps just variations in the speed of warming.
We are in an ocean cooling trend--and reduced sunspot phase--that has nullified the warming due to the exit from the Little Ice Age and significant human factors new since 1950.
This effect of numerous factors is separate from the question of whether warming is good or bad for life on Earth, on balance.
And that question is separate from whether the left-wing government power grab solutions that the global warming Left claims must be our response to warming is the smart way to go, if global warming will take place to a degree that will actually harm people.
I am a climate "denier" because while I don't deny that CO2 warms the atmosphere, that people put CO2 into the atmosphere, and that this addition has some impact on warming the atmosphere; I don't think that the science has proven that human action is decisive compared to all the natural factors that warm the atmosphere, I don't think we have a handle on how all the natural factors affect the climate one way or the other, I don't think the science has determined that warming is absolutely bad and at what level it can actually harm life on our planet, and I sure as Hell don't think that the left-wing policies that kill economic growth and expand government and international powers over our lives are the proper answer to any problems identified.
Tip to Instapundit.