Yes, sure, climate change will cause sea level rise, which is going to be bad for places like Bangladesh and its rice and shrimp farmers, who will all end up in Dhaka. But. Yep, there might actually be a but. The same climate change is also causing increased flows of water — and, crucially, suspended sediment — from Himalayan glaciers. All you have to do is damn up the water and the silt will build up the land, counteracting the rise in sea level. With any luck, the net result will be stasis. And farmers can keep farming. Until the glaciers run out, that is.