Argument: Humans are already changing Earth; how can geoengineering be wrong?
Ken Buesseler, a senior scientist of marine chemistry and geochemistry at Woods Hole Oceanographic Institution in Massachusetts - "We’re already changing the ocean. You can’t avoid altering the ocean by continuing to drive cars and emitting CO2. The ocean will change no matter what."
Bryan Wassh. "6. Geoengineering". Time, What's Next in 2008: "the truth is, we're already performing an unauthorized experiment on our climate by adding billions of tons of man-made carbon dioxide to the atmosphere. Unless the geopolitics of global warming change soon, the Hail Mary pass of geoengineering might become our best shot."