Plants are useful to us in many ways.

Plants are our food.

We use plants to make things  like medicines and clothing.

And we breathe the oxygen that plants produce.

Without plants, humans cannot live.

Today, cars and factories  produce a lot of carbon dioxide.

That is what makes air pollution.

Plants take in carbon dioxide.

They turn it into oxygen.

Humans need oxygen to live.

We breathe in oxygen and  breathe out carbon dioxide.

So humans need plants to live,  and plants need humans to live.

Humans eat plants to live.

We eat many different parts of the plants.

We eat the roots and stems.

We eat the leaves and seeds.

The roots are the part of the  plant that grows under the soil.

Potatoes and carrots are roots of plants.

We also eat the seeds of plants.

Rice, corn, and sunflower  seeds are seeds of plants.

If we don't pick the sunflower seeds, they fall to the ground and produce new plants.

Grain is the harvested seed of some  plants, such as wheat, oats, and barley.

We use these grains to make breakfast cereals.

Some grains are crushed to make flour.

Then we use the flour to  make pasta, bread, and cakes.

We use herbs and spices to add flavor to our food.

Herbs are the leaves of plants.

Spices are the roots, seeds, and barks of plants.

Just a pinch of herbs or spices  gives our food a delicious flavor.

Do you like celery? Celery  is the stem of the plant.

It is delicious with a spoonful of peanut butter.

What other plant parts do you like to eat?