Gaurdian: Its a product that you can find in newspaper columns and TV talk shows and in conversations over drinks, at barbecues, in taxi rides and in political speeches.
You can find this product in bookstores, on sponsored speaking tours, in the letters pages of local newspapers and even at United Nations climate change talks.
This product is doubt - doubt about the causes and impacts of climate change, the impartiality of climate scientists, the worlds temperature records, the height of the oceans...