Ozone layer didnt evaporate, acid rain is not real, and DDT isn't bad, why should we believe in Global Warming?

a href="http://news.yahoo.com/s/ap/20091022/ap_on_sc/us_climate_poll_5;_ylt=AkXM7XogwKCuhGAWtyjWE7ar_aF4;_ylu=X3oDMTE2djNnN2ltBHBvcwMxBHNlYwN5bi1yLWItbGVmdARzbGsDZXYtcG9sbDp1c2Jl"http://news.yahoo.com/s/ap/20091022/ap_o…/a