Les atomes et les éléments

Green chemistry is a field that looks at the sustainability of products and processes designed by people.

Learn how vehicles affect air quality, including their contribution to smog.

Learn about vehicles that use hydrogen for fuel.

Learn about the four main types of chemical reactions.

Learn how to tell if a chemical reaction has taken place.

Learn about the special conditions that let some chemical reactions take place.

Learn about how catalytic converters make vehicle emissions less harmful.

Learn about the wide variety of fuels used in vehicles.

This backgrounder explains what greenhouse gases are and how they contribute to climate change.

Hydrogen’s tendency towards combustion is what makes it both a dangerous chemical element and a useful energy source.