We often hear in the media about the alleged negative effects of us burning fossil fuels and pumping more CO2 into the atmosphere, but what you almost never hear about is the POSITIVE effects of there being more CO2 in the atmosphere. Embedded in the player above are are two lectures – one from 2013, one from just a few days ago – by Matt Ridley, about one such positive effect: the desert regions of the planet are greener than they were 30 years ago. In fact, in just a single generation, a whole new continent’s worth of green vegetation has been added to the planet, and you can thank our CO2 emissions for that. I challenge any open-minded person to watch both of these lectures – less than an hour in total – and still believe that climate change is a serious problem. For a transcript of the second lecture with slides, go here. For more evidence of global greening due to increased CO2 levels, see here.