The video discusses the continuous rise in global atmospheric CO2 levels and how plants are using this extra CO2 to enhance their growth. American satellites have observed a significant greening of Earth's vegetated land over the past 33 years, with only a small percentage experiencing losses. The additional leaves from increased CO2 could cover two continental USA's. However, researchers warn that plants may eventually acclimatize to higher CO2 levels, limiting further growth. Future plant growth will also be constrained by water and nutrient availability, which are likely to be affected by climate change.

What has been the impact of rising CO2 levels on Earth's vegetated land over the past 33 years?

• A greening of up to 50% of vegetated land

• No change in vegetation

• A loss of 50% of vegetated land

• A decrease in vegetation by 50%

What percentage of Earth's vegetated land has suffered losses despite the rise in CO2?

• 4%

• 25%

• 50%

• 10%

According to the study, how extensive is the additional leaf growth due to increased CO2 levels?

• It could cover the entirety of two continental USA's

• It could cover the entire continent of Asia

• It could cover the entire continent of Europe

• It could cover the entire continent of Africa

What is a potential future limitation for plant growth despite increased CO2 levels?

• Unlimited access to sunlight

• Abundant soil nutrients

• Acclimatization to CO2 and limited water access

• Constant temperature conditions

What do researchers predict about the future effect of rising CO2 on plants?

• Plants will continue to grow indefinitely

• Plants will stop responding to CO2 increases

• Plants will become more resilient to climate change

• Plants will require less water