Global Warming: The Rest of the Story

First it was acid rain, then the ozone hole. Now, CO2 in the air is supposed to bring on a climate catastrophe. Is global warming really a threat, are the polar ice caps in danger of elting and are coastal areas of habitation under threat of a deluge?
Do we therefore need an energy-CO2 tax?
The author explains in straight-forward language what climatological research indicates about the following questions:
• What is and how does the greenhouse effect work? What does that mean for life on earth?
• Why is a rise in temperature feared?
• How and for what reasons has climate changed over the centuries and what role was played by the greenhouse effect?
• What do we really know about the effect of a growing concentration of greenhouse gases in the atmosphere and what do current computer programs make of that ?
• How do plants and algae cope with increased CO2 and temperature through photosynthesis?