What would happen if humans are capable of photosynthesis?

Before I discuss the content, I also want to note that human cells cannot generate photosynthetic pigments, so the function of humans are not born to nourish themselves. So my own post is "If". Try on imagining a little, right?

Humans are heterotrophs, which obtain their energy from food sources. However, supposing we can absorb sunlight and convert solar energy into energy, convert CO2 and water into organic matter that generates ATP to supply the body ... Is it more convenient? Let’s try.

🌱The world is full of green.
To be able to photosynthesize, you must first have photosynthetic pigments such as chlorophyll of leaves. And so your skin will turn green, and can withstand the intense intensity of sunlight. It may not be your favorite skin color but is the skin color needed to sunbathe without fear of anything.

All day of exposure to sunlight can provide 200 calories. Meanwhile, a healthy person needs up to 2,000 calories a day to survive, not counting the energy used for physical activity and work.

Moreover even when absorbing sunlight, converting it into energy is not easy. Only 5-10% of the sunlight that plants receive can convert into useful energy.

You will have to lie in the sun all day. Over time, body size also grows to increase the area exposed to light, even your body can start to grow leaves and divide in four directions. This evolution will make your photosynthesis easier.

Dispute each CO2 molecule on Earth.

Along with sunlight and water, your body will need more CO2 to start photosynthesis. You will have to inhale sufficient amount of air containing the amount of CO2 needed. However, with the current Earth atmosphere, CO2 only accounts for less than 0.05%. If humans start photosynthesis, with the current population and plants, CO2 will gradually become scarce, life will eventually end here.

Well, only a few basic reasons have shown that humans are born not for self-sustenance. Anyway, this is just the theory of plants applied to humans.

You know, if people are able to photosynthesize, they will have much more optimal body structures. Put forth your think and imagination to your comments below.
Thank you for reading!