http://www.theguardian.com/environment/2015/jul/08/exxon-climate-change-1981-climate-denier-funding

Even Exxon realized AGW was real in the 80's and factored it into their business plan.

While there are a few idiots still denying the science, and many well funded groups working to lie about the science, it should be painfully clear to all but the most blind that anthropogenic global warming is an established fact.

Those that slandered the scientists and successfully worked to prevent any action will be damned by future generations.

Its no longer a question of "How much will it cost us to avoid global warming"... the question is now "How many hundreds of millions will die from the direct and indirect impacts of the global warming we have allowed, and will civilization as we know it be able to carry on under the burden imposed on it"

I have thought about proposing a kickstarter to fund a small satellite to be put in Geosynchronous orbit, carrying the names and words of those that deny the facts... so future generations will know who to curse for the mess they have inherited.