The thing about Climate change is that it was happening for 4.5 billion of years before human's industrial activity. If an explanation is sufficient to explain something (such as climate change), there is no need to complicate it further. If nature by itself could change climate as it did, it is not required that some new external cause plays any or significant part in changing the climate.
The problem is that AGW's solutions are not as harmless as they seem. First of all, additional taxes (Carbon tax) is not what I think is good for us.
Bio-fuels have drawbacks as well. The food that could have been used to feed people (or animals) could be converted to car fuel. This would reduce food supply, and drive the prices up. What about all the poor people who can barely afford food? Now that
is something to worry about.
What if humans prepare for warmer climate (build houses suitable for warmth and not arctic weather) and we get another ice age instead? People could freeze to death, or at least heating bills would really go up without properly insulated houses.
Any human change (if they could really) could easily be reversed by nature. Why add additional taxes, and add inconviniences to humans, if nature could always get a last say in any climate change?
The argument that humans burn CO2, and CO2 causes GW is flawed:...CO2 lags an average of about 800 years behind the temperature changes-- confirming that CO2 is not the cause of the temperature increases. One thing is certain-- earth's climate has been warming and cooling on it's own for at least the last 400,000 years, as the data below show. At year 18,000 and counting in our current interglacial vacation from the Ice Age, we may be due-- some say overdue-- for return to another icehouse climate! http://www.geocraft.com/WVFossils/last_400k_yrs.html