We are truly a creation of the unstable, geologically unstable planet on which we live. And if we're going to survive on our small ball of rock, it looks like we're going to have to be prepared for even greater change and instability. We're nomads, really, at root. And most of our problems come, and have come, from settling down and trying to live in one place, permanently, in large population numbers. Very definitely, in terms of the population centres where we live, many population centres that are currently important are going to be flooded by sea level rise. Some are going to be affected by climate change. They're going to become less attractive. And I think one lesson that we have to learn from the past and that we're certainly going to have to build into our response to future challenges is that we have to be prepared to move. MUSIC: "Sabali" by Amadou and Mariam. For human life to continue to prosper, it seems we're going to have to relearn to be adaptable. How we eat, drink, work and where we live will need to change in the long term if we want to sustain an ever-growing human population. After all, with every orbit of the International Space Station, , children are born on our planet. We have almost completed our orbit around the world. From our vantage point high above, we've seen how nature is constantly reshaping our home. Every minutes, the Atlantic gets a little bigger. Fierce storms and rain clouds rip cross continents. And our oceans teem with exotic and wonderful life. We can see how humankind has also changed this landscape. And usually not for the better. Our precious rainforests get smaller. Pollution covers our cities. Waste clogs up our oceans and beaches. And we seem determined to simply consume ever more. Maybe we can learn a lesson from the last stop on our journey. Sweden. Sweden is the third largest country in the European Union, but its population is just over nine million. Only two million more than London. It's one of the most stable, prosperous and healthy nations in the world and uniquely, also the most charitable. I think Sweden is an incredibly important example, the reason being is the UN have suggested the rich countries of the world should aim to give three-quarters of a percent of what they earn every year, to try and help the rest of the world develop. It's important because Sweden have seen this and said, "We can go way beyond that. "We're incredibly rich, incredibly fortunate. We can do better." Just imagine if every other country in the world decided that they could also afford over % of what they earn. Imagine the trillions of dollars that would be generated to lift billions of people in the world out of poverty and give them the same rights to food, clean water, education that we have now. Every minutes, people in Sweden give half a million pounds to charity. I'm pretty confident that humans will eventually figure out how to look after our planet better. I think if you talk to individuals, they're concerned about the environment, they just want to know what to do. So do companies, I think, too.