Guardian: The Prince of Wales is to make a scathing attack on big business’ environmental impact with the launch of a new book and documentary film. The book, called Harmony, is due to be published in 2010 by HarperCollins and the prince is reportedly waiving his author’s fee, although royalties will go to his charitable foundation, The Prince’s Trust. In an echo of Al Gore’s An Inconvenient Truth, which evolved from a slideshow presentation into a hit eco documentary, the prince’s film is …