Impact of CO2 on Climate and Plants

The video discusses how plants help cool the planet by releasing water through stomates, but rising CO2 levels are reducing this effect. Higher CO2 allows plants to close stomates, reducing water release and cooling, contributing to global warming. This change affects climate models and increases runoff, bypassing plant cooling systems. The study highlights the importance of considering plant responses in climate predictions and policy decisions.

What role do trees and other plants play in regulating the Earth's temperature?

• They have no effect on temperature.

• They help cool the planet.

• They increase the Earth's temperature.

• They only affect local temperatures.

How does increased carbon dioxide affect plant stomates?

• Stomates disappear completely.

• Stomates open wider to absorb more CO2.

• Stomates close to reduce water loss.

• Stomates remain unchanged.

What is the effect of plants closing their stomates due to higher CO2 levels?

• Increased plant growth.

• Increased water evaporation.

• Decreased water evaporation.

• No change in water evaporation.

What percentage of land surface warming is attributed to the effects of plants on evaporative cooling globally?

• 50%

• 25%

• 16%

• 10%

How does increased carbon dioxide affect water runoff from land surfaces?

• Decreases runoff.

• Increases runoff.

• Has no effect on runoff.

• Causes water to evaporate before runoff.

Why is it important for climate models to include plant responses to carbon dioxide?

• To increase plant growth.

• To predict weather patterns.

• To reduce carbon emissions.

• To improve climate predictions.

What should be considered when making changes to forests or ecosystems?

• The potential climate consequences.

• The economic cost.

• The aesthetic value.

• The availability of resources.

What is the potential impact of changes to the land surface on climate?

• No impact.

• Minor impact.

• Important climate consequences.

• Only affects local weather.

Where was the study on carbon dioxide and vegetation published?

• Environmental Research Letters

• Proceedings of the National Academy of Sciences

• Science Daily

• Nature Journal

Who is the narrator of the study's findings?

• Carnegie Institution

• Lan CAO

• Kin Caldera

• John Strm