How increased CO2 Levels Affect Plants
Sung-Chi Lau, Jae Rhee
Burnaby South Secondary
Floor Location : I 125 V

Summary By:Sung-Chi Lau & Jaeyong Rheernrn The purpose of our experiment was to find out how increased CO2 emissions affect plants, whether by helping the plants grow, or degrading them. We chose to do this project because of the rising CO2 levels in our world, wondering how plants in our world would fair to this change. rnrn To test the effects of CO2 on plants, we grew our own plants, grass, green onion, green beans, red beans, and soy beans. (Other plants are quite hard to grow in winter.) When the plants were grown to a certain height, we separated the plants into 2 groups, a test group and a control group. We then sealed each group in a large spacious transparent plastic bag, and then placed a platter with baking powder and vinegar in the bag containing the test group plants. Immediately after, we sealed both bags up, trapping the CO2 in the test group bag, while eliminating a variable by sealing the control group bag as well.rnrn With the 5 groups of plants that we tested on, (red beans, green beans, grass, green onion, and ferns) most of the plants showed positive results when place in a environment with a higher level of carbon dioxide.( All the plants in the CO2 group showed accelerated growth compared to the control group except for the Fern group, which showed average results.) Plants in the test group also seemed to be more moist(leaves and soil), being able to retain water more than the plants in the control group.rn rn If we were to repeat this experiment, we would try to have a larger selection of plants to test on and to have more pots for each individual plant. This would give us a more accurate and clear picture to see how plants are affected by an increase of CO2.rnrn So in conclusion, we can say that an increase of CO2 can be beneficial to plants, as plants do need carbon dioxide for photosynthesis to make energy, and with more energy, plants can sufficiently grow faster. However, even though an increase in CO2 might benefit plants, it can permanently damage our environment, and that is something we must look out for.rn rn