- Jordan Peterson says the increase CO2 levels will actually be good, since higher CO2 levels close the pores of plants so they don't evaporate so much moisture - and they can grow twice as fast, producing more oxygen.
"Yes, increased levels of carbon dioxide (CO2) can lead to the partial closing of stomata, which are the pores on the surfaces of leaves and stems that allow for gas exchange. When CO2 levels are high, plants can afford to partially close their stomata, which reduces water loss through transpiration (evaporation of water from the plant surface) without significantly affecting the intake of CO2 for photosynthesis. This is one of the reasons why plants can be more water-efficient under elevated CO2 conditions. However, the extent to which this occurs can vary among different plant species and environmental conditions.
The extent to which increased levels of carbon dioxide (CO2) improve plant growth can vary widely depending on the plant species, environmental conditions, and the level of CO2 increase. Generally, higher CO2 levels can enhance photosynthesis, leading to increased plant growth, a phenomenon known as the CO2 fertilization effect. This effect is more pronounced in C3 plants (which include most crops and trees) than in C4 plants (such as maize and sugarcane).
On average, for C3 plants, a doubling of ambient CO2 levels (from about 400 ppm to 800 ppm) can result in a 30-50% increase in biomass under optimal growing conditions. However, this growth response can be limited by other factors such as nutrient availability, temperature, and water supply. For example, if a plant is already limited by a lack of water or nutrients, the growth response to increased CO2 may be reduced.
It's also important to note that while increased CO2 can boost plant growth, it can also have negative impacts on other aspects of the environment and human health, such as contributing to climate change and ocean acidification. Therefore, the overall effects of rising CO2 levels are complex and multifaceted." [ ChatGPT 4]