Should we be concerned about global warming?

Abstract

Accurate scientific predictions of the true human health outcomes of global climate change are significantly confounded by several effect modifiers that cannot be adjusted for analytically. Nevertheless, with the documented increase in average global surface temperature of 0.6 C. since 1975, there is uniform consensus in the international scientific community that the earth is warming from a variety of climatic effects, including cyclical re-warming and the cascading effects of greenhouse gas emissions to support human activities.