What is needed for photosynthesis to occur?

For photosynthesis to occur, the plant needs an organelle called the chloroplast. The components are carbon dioxide, light energy, and water.

Reactants for photosynthesis:

1. CO2 - Carbon dioxide

2. light energy also known as sunlight

3. H2O - Hydrogen

Oxygen however can be considered a "waste" to plants (it can be mistaken as an intake for the process) because it produces carbohydrates for energy, yet releases oxygen into the atmosphere.

Products of photosynthesis

C6H12O6 - Carbohydrates

O2 - Oxygen

On the contrary animals, or humans need that oxygen and carbohydrates to produce carbon dioxide (the waste) and water. Instead of photosynthesis animals use cellular respiration.