Thus The Economist today. “Why scientists are (almost) certain that climate change is man-made,” elaborates the newspaper. Here is the argument in just a few words. The single most important factor that influences climate change is carbon dioxide. Its concentrations in the atmosphere have reached a new high this year. The present concentration is the highest in a million years. Most of the increase has been caused by people burning fossil fuels. And that is all. Amazingly, scientists are not yet fully sure of the above. But both the mighty newspaper and the scientists are missing the point. Ever-higher levels of carbon dioxide in the atmosphere are but a proximate cause of climate change. The ultimate or real cause of climate change is the ever-larger number of humans on the planet. And that is the whole truth. I only wonder when scientists will finally be certain about it. Will it take them another million years?