In the fierce and sometimes ugly fight over global climate change, we finally have an answer coming from the earth itself: the weather is telling us climate change is here and we are causing it. Theoretical physicist Michio Kaku is among the scientist who say the world is giving us signs that climate change is already happening (to see how he explains it, watch the video above). This summer, there have been relentless droughts, wildfires, melting glaciers and unprecedented storms – all happening at the same time. And around the world people are demanding something be done about it. Even in the United States, ground zero for climate change denial, six in ten Americans say they believe it is indeed happening. But political leaders are missing in action – cowed by a vociferous climate change denial club, which is actually now shrinking faster than the polar ice caps.