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2. Don’t you understand that 97% of “real scientists” agree that CO2 is a dangerous/is harming the environment/is affecting the climate/is humanity’s most serious threat to life around the world?

Global Warming Petition Project
31,487 American scientists have signed this petition, including 9,029 PHDs.

3. But CO2′s harmful effect on the climate is basic physics/has been an established fact since the 1890′s/has been known since Arrhenius first theories 120 years ago?

Where is the hot spot in the upper atmosphere?

No smoking hot spot
1. The greenhouse signature is missing. We have been looking and measuring for years, and cannot find it.
Each possible cause of global warming has a different pattern of where in the planet the warming occurs first and the most. The signature of an increased greenhouse effect is a hot spot about 10km up in the atmosphere over the tropics. We have been measuring the atmosphere for decades using radiosondes: weather balloons with thermometers that radio back the temperature as the balloon ascends through the atmosphere. They show no hot spot. Whatsoever.
If there is no hot spot then an increased greenhouse effect is not the cause of global warming. So we know for sure that carbon emissions are not a significant cause of the global warming. If we had found the greenhouse signature then I would be an alarmist again.

1. The reason a (real) greenhouse warms up is because vertical convection (which causes the land outside the greenhouse to cool off) is blocked by the glass roof. Similarly, the biggest cause of warming of the Earth is the tropopause, which also blocks vertical convection.
2. While CO2 does have the potential to provide some blocking of IR, its role is diminished by the presence of other mechanisms which allow heat to circumvent the CO2 effect in most of the troposphere: (a) vertical convection, (b) latent heat of water (water vapor changes to liquid water droplets and then changes to ice particles, each time circumventing the CO2 affect by transferring heat to higher altitudes.(c) most of the heat input to earth is in the tropics and thunderstorms in the tropics are very common: warm moist air rises to the upper levels of the troposphere, cools to ice pellets which fall to the lower levels as cold rain, thus again circumventing any CO2 effect.
3. There is considerable emphasis on IR absorption by CO2, even though it is largely circumvented in the lower and middle troposphere, but CO2 also plays an emissive, cooling role, which is very important at the upper troposphere, where other means of transferring energy across the stratosphere are no longer available (water is largely frozen out by the extreme cold, and convection is blocked by the stratosphere.