Rising tides cause billions of dollars in damage to electrical grids, water and gas pipelines, cell phone networks, railroads and subways lines -- in short, all the utilities and infrastructure that we depend on everyday. Businesses implode, cars corrode, tempers explode. Our economy grinds to a soggy, salty halt.
This past week, the concentration of carbon dioxide in the atmosphere exceeded 400 parts per million (ppm) for the first time in at least 4 million years. Here's a simpler way to put it: pollution in the air, the kind that captures greenhouse gases and makes our planet warmer, just reached the highest level ever in recorded history.