much indeed. as the march progresses. as we know, climate change is already reshaping our world. some regions are warming much faster than others. our environment editor, justin rowlatt, is taking a road trip, travelling from alaska to california, where even in one of the richest countries in the world, they are still struggling to cope. the top of our world is changing. warming twice as fast as the rest of the planet. and it is destroying communities. yeah, my house used to be about 20 feet, out where you see the water break. the island of shishmaref is on the front line of climate change. as temperatures rise, less sea ice forms, exposing the coast. it s getting later and later every year for this ocean to freeze up. it s tough. but. got to keep going.