Global Warming (and cooling)
Man, in his vanity, thinks he controls the weather.
The Earth's climate has alway been either warming or cooling -- since the dawn of time. The measured variations have often been very large and very rapid.  In the last 3000 years, temperatures in the North Atlantic have changed greatly within a few decades. During the most recent Ice Age, the variability was much more. The frequent ice ages of the last few million years appear to be linked to changes in the absorbed incident solar radiation, which in turn is affected by small orbit changes of the Earth . Longer-term climate changes seem to be linked to continental drift and other tectonic events. Shorter variations, on the time-scale of decades, appear to be caused by atmosphere-ocean interactions and changes in ocean circulation. Alternatively, they could be due to external causes, such as variations in solar irradiance or in solar activity. None of the climate models incorporate the effects of a variable sun. It has always been assumed that solar variability is simply too small, but this view is now changing. Evidence shows that solar winds and sunspots can affect the earth's ozone layer and influence atmospheric circulation or cloudiness -- which in turn can cause significant climate changes.As for climate change related to atmospheric greenhouse gases: over a period of hundreds of millions of years, carbon dioxide (CO2) has sharply declined; its concentration was as much as 20 times greater at the beginning of the Cambrian Period, 600 million years ago. Moreover, glaciations have occurred throughout geologic time even when CO2 concentrations were high. Breathing adds to CO2. Researchers have determined that human breathing contributes to about 8.99% of the CO2 in the atmosphere. If we were to kill off half the world's population this would reduce CO2 by 04.5% which is 400 times the reduction that has resulted from the extreme measures imposed by the government. Nature holds the solution Trees, grass and other vegetation absorb CO2 from the air.  The reason CO2 has increased is because we have destroyed our forests and paved over our grasslands.  The cure: plant millions of trees.  This is the simplest and least expensive solution.