Mario Molina studied chemicals. He learned about bad chemicals in the air. The chemicals were hurting the environment. Mario Molina wanted to help protect Earth.
Photo Credit: (c) Ingram Publishing/SuperStock
In the Know
People Who Work for Peace
September 21st is the International Day of Peace. Let’s look … read more
In the Know
What Makes a Community?
Denver needed water. They built a dam. It created a … read more
In the Know
What Is Archaeology?
How do we find out about the lives of people … read more