Solarisation is

The graph shows the relationship between light intensity and the exchange of carbon dioxide by plant leaves. Why is the maximum amount of carbon dioxide released when the light intensity is $0$ units?

Look at leaves of the same plant on the shady side and compare them with the leaves on the sunny side. Or,compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why?

The Law of Limiting Factors for photosynthesis was proposed by ........

The level of $CO_2$ available in the atmosphere is limiting for $........$ plants.

What is called Warburg's effect on photosynthesis?