Sometimes it can seem that history is turning in a wide arc, toward an unknown shore. Yet the destination of history is determined by human action, and every great movement of history comes to a point of choosing.
George W. BushConcentration of greenhouse gases, especially CO2, have increased substantially since the beginning of the industrial revolution. And the National Academy of Sciences indicates that the increase is due in large part to human activity.
George W. BushWe do not know how much our climate could or will change in the future. We do not know how fast change will occur or even how some of our actions could impact it.
George W. Bush