Is global warming really happening?
No question. Every global indicator shows warming: three independent instrumental networks, sea ice (retreating), permafrost and glaciers (melting), species migrations (poleward), borehole and tree-ring-derived temperatures (upward), and spring thaws (earlier)….and don’t forget bathing suits The warming has varied regionally, but the global average temperature now is about 1.2 F warmer than 100 years ago and probably the warmest in at least a millenium [NRC 2006]. Europe and Asia have warmed more than the US, and the Arctic the most, enough to significantly affect indigenous peoples and wildlife.
Answer 2: Almost everyone accepts that the globally averaged world temperature has risen in the past century. But almost everything which flows from that “fact” is disputed. World Climate Report is a very good site trawling information which challenges the consensus. Real Climate is a very good website defending it.
