I do see significant change from our current dependence on fossil fuels, but for argument’s sake, what’s the best case scenario for global warming and climate change? Could we create a super verdant earth epoch? What probability do our most advanced climate models have for such an outcome? And what’s the economic cost of moving coastal populations and those in high risk zones to new cities designed from ground up using the latest thinking in urban planning? What’s the cost benefit from high one off relocation costs to long term gains from smarter cities?