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Air Pollution Science Fair Project

Carbon Dioxide and Plant Growth

Carbon Dioxide and Plant Growth | Science Fair Projects | STEM Projects
Let's explore the effect of carbon dioxide on plant growth. We'll create a replica of an atmosphere using two-liter bottles and measure the growth of plants in a carbon dioxide-rich environment compared to a normal environment.


The hypothesis is that plants will grow faster in a carbon dioxide-rich environment.

Method & Materials

You will make your own carbon dioxide by combining baking soda and vinegar, and measure the growth of plants in the two environments.
You will need potting soil, two two-liter soda bottles with the tops cut off, four peat cups with seeds already germinated, two shallow dishes or paper cups cut in half, baking soda, white vinegar, a scale, a graduated cylinder, a thermometer, and a ruler.


The experiment showed that plants grew faster in the carbon dioxide-rich environment than in the normal environment. The temperature was also higher in the carbon dioxide-rich environment.

Why do this project?

This science project is interesting because it shows how plants can use carbon dioxide to grow faster, and how global warming can affect plant growth.

Also Consider

Variations of this experiment could include testing different amounts of carbon dioxide or different types of plants.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

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