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Increasing the light intensity will boost the speed of photosynthesis. Carbon dioxide concentration. Sometimes photosynthesis is limited by the concentration of carbon dioxide in the air. Even if there is plenty of light, a plant cannot photosynthesise if there is insufficient carbon dioxide.
with light, less sun= less photosynthesis, more sun= more photosynthesis. This â¦is because there is a 'light dependant reaction' as part of photosynthesis, and therefore photosynthesis can only happen when there is enough light. CO2 is needed for photosynthesis. The more co2, the faster the rate of photosynthesis. Increasing the Temperature increases the rate. This is because there are enzymes in the process of photosynthesis, and with enzymes, the rate increases with temperature (up to a point, when it is too hot for the enzymes to work).