A study looked at how Japonica rice plants respond to higher CO2 levels and temperatures. They found that increased CO2 boosted photosynthesis in the leaves, while higher temperatures had less of an impact. The plants used water more efficiently with more CO2, but their pigment content decreased. Overall, higher CO2 levels had a bigger effect on photosynthesis and leaf pigment than higher temperatures did. This suggests that it's important to consider both factors when trying to help rice plants cope with warmer temperatures.