How misfiring environmentalism risks harming the world’s poor

THANK GOODNESS for the enthusiasts and the obsessives. If everyone always took a balanced view of everything, nothing would ever get done. But when campaigners’ worldview seeps into the staid apparatus of policymaking and global forums, bad decisions tend to follow. That, unfortunately, is especially true in the world of climate change.One example is the effect of global warming on the world’s poorest people. As the planet , extreme events such as are becoming more common and more severe. Many places are becoming less habitable. Over the coming decades many vulnerable farmers, from Mali to the Mekong Delta, will find their crops failing more frequently. And as resources grow scarcer, more fighting will break out.