Notwithstanding denials by climate-skeptics, the global scientific community considers the world environment is rapidly worsening. They argue that failure to adopt measures to reduce CO2 gas emission in the atmosphere could lead to disastrous social-economic, politico-security and environmental consequences. Skeptics argue that climate changes are due to nature's own cyclical phenomenon. They fail to understand that climatology as a scientific discipline is in its infancy, but overwhelming evidence suggests that human activities are responsible for this. Smart campaigning and some mistakes by the IPCC in its 2007 report enabled skeptics to derail the efforts to adopt a legally binding CO2 emission target in Copenhagen in 2009.