We use energy every day: when we ride in a car or bus, turn on the TV, and even when we take a hot shower.

Today, there are over 6 billion people living around the world. That's 6,000,000,000 people! And we're using a lot of energy.

Most of the energy comes from burning fossil fuels, like coal and oil. This releases carbon dioxide (CO2) into the atmosphere.

As CO2 levels rise, Earth's temperatures rise too!