Below the threshold no assimilation takes place. Thus it seems that only about two-thirds of the atmospheric carbon dioxide is available for photosynthesis”.

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun ... the carbon cycle — it also creates the oxygen necessary for respiring organisms. Interestingly ...

However, there is also a positive effect, as scientists from WUR have discovered: for the past century, the extra CO 2 has led to more efficient photosynthesis in tropical trees. This is good news ...