Terrestrial plants are responding well to the increase in CO2 levels caused by human activities. The rise in CO2 is actually helping plants grow better by increasing photosynthesis and water-use efficiency. This means that plants are able to take in more CO2 and lose less water, leading to an overall increase in global leaf area and plant productivity. The response of plants to rising CO2 levels has been strong and consistent, showing that they are adapting well to the changing climate.