Our common addiction to dirty, nonrenewable energy sources keeps other kinds of emergencies coming: natural disasters (up 430 percent since 1975) and wars waged for control over scarce resources (not just Iraq and Afghanistan but lower-intensity conflicts such as those that rage in Nigeria, Colombia and Sudan), which in turn create terrorist blowback (a 2007 study calculated that the number of terrorist attacks since the start of the Iraq war had increased sevenfold).8
