ELI5: Explain Like I'm 5

Hydrogen technologies

Hydrogen is a gas that we can't see, but it's everywhere! It is a very light gas and is usually found combined with other elements like oxygen in water or carbon in fuels like gasoline.

Hydrogen technologies are all about finding ways to use hydrogen as a fuel to power different things like cars, homes, and even spaceships. Hydrogen fuel is special because it doesn't produce any harmful emissions, unlike gasoline or other fossil fuels.

To use hydrogen fuel, we need to first produce it. This process is called "splitting" and it usually involves using a special machine called an electrolyzer. This machine takes water and separates it into hydrogen and oxygen gas using electricity.

Once we have the hydrogen gas, we can use it in a fuel cell to produce electricity. A fuel cell is like a battery, but instead of storing energy, it generates it continuously as long as hydrogen and oxygen are supplied. When hydrogen is fed into the fuel cell, it reacts with oxygen from the air to produce electricity, water, and heat. This electricity can be used to power things like electric cars or buildings.

Hydrogen fuel can also be used to power rockets and spaceships. In this case, the hydrogen is burned with oxygen to produce hot gases that provide the thrust needed to launch the vehicle into space.

Overall, hydrogen technologies are all about finding ways to use this clean and abundant gas as a fuel to power our world without harming the environment.