Climate change action vs anti-climate science rally

The overwhelming majority of scientists are unequivocal that human activities are causing climate change. From the Australian Academy of Sciences August 2010 statement:

"Human activities are increasing greenhouse gas levels in the atmosphere".

"The growth in greenhouse gases has accelerated through the 20th century to the present 90-96 (see Figure 4.1). Studies of the stores and sources of these gases, both natural and human-induced, show that the main causes of the increasing concentrations are emissions from human activities 97-101 (see Figure 4.2). Human activities cause CO2 input to the atmosphere from fossil fuel burning, other industrial sources such as cement production, and deforestation."

"Why are CO2 emissions from human activities regarded as so significant?
Large amounts of CO2 are continually transferred to and from the atmosphere, which exchanges carbon with the oceans and vegetation on land. Until around 200 years ago, these natural exchanges were in rough balance, shown by the nearly constant concentrations of atmospheric CO2 for most of the last two thousand years. The importance of human-caused CO2 emissions is that they are disturbing this balance, adding carbon to the atmosphere faster than it can be removed by uptake by vegetation, the slow mixing of CO2 into the deep oceans, or the even slower weathering processes that control the carbon balance on geological timescales."

From section 4 - Are human activities causing climate change? from the Australian Academy of Sciences August 2010 Policy report - The Science of Climate Change: Questions and Answers.
http://www.science.org.au/policy/climatechange.html