There are many ways to make electricity.
But not all of those ways are good for the environment.
Today, a lot of electricity is made by burning oil or coal.
But that pollutes the environment.
Green energy is different. It comes from natural things like the sun.
In fact, it's called green energy because it doesn't hurt the environment.
There are many dfferent kinds of green energy.
Solar energy comes from the sun.
Special cells collect sunlight and change it into electricity.
Wind power comes directly from the wind.
Another green energy comes from moving water.
This is the most common kind of green energy.
Around the world, this water power provides enough electricity for 28.3 million people.
Green energy is not perfect.
Sometimes there isn't enough sun or wind when we need electricity.
Energy companies also need to spend a lot of money to produce green energy, too.
So while green energy is getting cheaper, it can still be very expensive.
As these problems are solved, green energy will give us a good way to make electricity but not pollution.