here we are in the heart of the rhone glacier, this space here. it is so peaceful here. ice. for years, uv resistant blankets have been used to slow the melt. this technique has been repeated across europe, and recently in china. but since we visited, the swiss government has warned that unless carbon emissions can be reduced, 90% of the remaining glaciers will have melted by the end of the century. next, we are heading north of the arctic circle, to finnish lapland, and christmas may have come and gone, but there are still plenty of reindeer to be found there, as ade discovered. this is a proper winter wonderland. it is so beautiful out here. everywhere you look is just a postcard. there are more reindeer in lapland than people. there are around 200,000 of these animals, and most of them roam free. but some of them, like these ones, are tamed and specially trained for the reindeer safaris. just a little blanket. finally, it's my turn to have a go. if you want to go, you just say "go." so i just say "go?" as simple as that? go, go, reindeer, go! he's not listening to me!