In the 21st century, some things haven’t changed. For example, religion is still very important to many people around the world.
But many other things have changed in how people live and work together. These changes can bring problems. New technology helps people talk to each other in new ways. But some people use technology to harm others.
When something happens in one part of the world, it can affect other parts too. Some countries have more people being born, while others have fewer. But overall, Earth’s population is growing. By 2050, almost 10 billion people might live on Earth. This could make it harder to have enough food and fuel for everyone. Knowing about these problems early helps us get ready to solve them.
