Free
Life in the mountains isn’t easy. Higher up, the air is thinner, which means it has less oxygen. That makes it harder to breathe. So, people may bring along canisters of oxygen when they climb Earth’s tallest peaks.
Mountain weather is cool and windy. Most modern comforts are far away. So are supplies, which must be carried a long way up the slopes. Even though it is hard, people around the world have worked and lived in mountain areas for centuries. They often make a living farming, fishing, or herding.
