Big oil, and big energy, corporations, multi-international corporations, are still out there trying to keep us hooked on fossil fuels. They have billions of tax payer subsidy dollars to use to make their case that the jury is still out, to convince us that all of the evidence to the contrary is trumped up....very similar to the way cigarette companies used to operate in the United States and still do operate around the world.....but...I'll give it a go anyway..........................WHAT EVIDENCE DO YOU HAVE OF GLOBAL CLIMATE CHANGE? If someone were to ask you that question, you could answer: "Sea level rise, global temperature rise, warming oceans, shrinking ice sheets, dramatically increasing carbon dioxide levels, declining Arctic sea ice, glacial retreat, extreme weather events, and ocean acidification are happening, not just predicted, but have already happened! The best source I have found for the support of this information, that details each of these events, is at:http://climate.nasa.gov/evidence/