Something that can make you very sick or cause harm if you touch it or eat it.

Something that is very harmful or poisonous.

Energy sources like coal, oil, or natural gas that come from the remains of plants and animals from millions of years ago.

A different kind of energy source that is used instead of traditional fuels like gasoline or diesel.

A type of fuel often used in big vehicles like trucks and buses.

A type of fuel made from plants or animal fats, used in place of regular diesel.

Things that can break down and go back to nature over time.

Energy sources that can be replenished and never run out, like sunlight or wind.

Another word for oil, a thick, black liquid that is used to make gasoline and other products.

Places where animals and plants naturally live and grow.

When there isn't enough food for everyone to eat.

To make something dirty, impure, or harmful by adding something unwanted.

Something that is not harmful or poisonous.