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