So let me be very clear, and I say this especially for those who might try to use this debate to mislead New Zealanders: there is no doubt that climate change is the greatest environmental challenge of our time, nor do I doubt that it will be the greatest challenge environmentally for my children's time to come. When our kids look back on this moment in history, they won't judge who was on the right side or the wrong side by what words were spoken; they will judge us by our actions. 