The World Wildlife Fund's 2012 Living Planet report notes that "we are using 50 per cent more resources than the Earth can provide. By 2030, even two planets will not be enough."
Rising populations and rising incomes have and will lead to a larger human footprint on the planet.
Are we a plague? Ask Agent Smith who tells the captive Morpheus in The Matrix? "Every mammal on this planet instinctively develops a natural equilibrium with the surrounding environment but you humans do not. You move to an area and you multiply and multiply until every natural resource is consumed and the only way you can survive is to spread to another area. There is another organism on this planet that follows the same pattern. Do you know what it is? A virus. Human beings are a disease, a cancer of this planet. You're a plague and we are the cure." Yikes!
I don't think we need to get that extreme, but how do we balance population while protecting nature? How do we balance grazing, farming, and fishing with a growing population and decreasing resources? Can we blend the wild with the urban? What kind of sustainable ideas do you have? Can you work those ideas into your academic and career goals?