Have you read the IPCC Summary for Policymakers? It's a really good summary of the current state of the science. It's a very complicated topic and you're not go

Have you read the IPCC Summary for Policymakers? It's a really good summary of the current state of the science. It's a very complicated topic and you're not going to get a complete answer in a HN reply. I'm serious, give it a read. http://www.ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_SPM_FINAL.pdf http://www.ipcc.ch/pdf/assessment-report/ar5/wg1/WG1AR5_SPM_...