It’s been shown time and time again that the best way to explain climate change is to show it happening. Al Gore’s “An Inconvenient Truth” worked because it came in movie-form rather than just an article or report. Of course, it’s tricky to show something that is happening on a scale of decades or centuries. Instead, a product like this takes a shortcut to metaphorically show the change that we’re expecting. This color-changing promotional mug created by the World Wildlife Federation shows the land masses of the world disappearing when filled with hot water, which is more or less what we’re in for in real life. Previously we’ve featured other climate change awareness promos using games, stickers and even color-changing mugs.