The learner will construct a basic carbon dioxide chamber using effervescent tablets as the source of elevated CO2 levels. Seeds will be planted in a CO2-rich environment and observed over several weeks. The learner will discover that elevated CO2 levels produce much larger plants in general; the two most obvious differences being an increased leaf area and a taller plant. It will be crucial to use a control group that grows under the exact same conditions, the only exception being normal CO2 levels. Utilizing a control group is the only way students will actually be able to compare their unique results. Necessary skills include: data collection, measuring, and graphing. Teachers may elaborate this lesson in many ways, which will be mentioned in a later section of this lesson.