Margaret Wente is asking the wrong questions about the science of global warming (The Science Isn't Settled. Now What? - Feb. 16). It's not reasonable to demand 100-per-cent certainty about the future before taking action, whether on climate change or anything else. Instead, Ms. Wente should try asking climate scientists questions such as: "Do we know enough about the risks of global warming to take serious action now?"
I'm lucky enough to talk to a lot of climate scientists in my job. Every one I've ever spoken to would answer that question with an unequivocal "Yes." The revelations that Ms. Wente cites have not affected the basic scientific case for action. If you dramatically increase the amount of heat-trapping gases in the atmosphere, you should expect major - and very costly - consequences.
associate director, Climate Change, Pembina Institute,