Sudbury Star: Altering environments to suit our needs is not new. From clearing land to building dams, we've done it throughout history. When technologies and populations were limited, our actions affected small areas -- though with some cascading effects on interconnected ecosystems. We've entered an era in which humans are a geological force. According to the website Welcome to the Anthropocene, "There are now so many of us, using so many resources, that we're disrupting the grand cycles of biology, chemistry...