Environmental factors are really important for how well plants can do photosynthesis and cellular respiration. Here are some key things that affect these processes:

1. Light Intensity:

   • When there’s more light, photosynthesis happens faster, but only up to a certain point.
   • For instance, the best light level can make the photosynthesis rate reach about 20 micromoles of carbon dioxide per square meter per second.

2. Temperature:

   • The enzymes that help in photosynthesis and respiration are sensitive to temperature.
   • Photosynthesis works best when it’s around 25 to 30 degrees Celsius, and cellular respiration can keep going strong even when it gets up to 40 degrees Celsius.

3. Carbon Dioxide Concentration:

   • If the amount of CO₂ doubles from 0.04% to 0.08%, photosynthesis can increase by as much as 50%.

4. Water Availability:

   • If there isn’t enough water, plants can have a tough time. Drought can lower photosynthesis by 50% or even more because plants close their tiny openings (called stomata) to save water.

Knowing about these factors is really important for helping plants grow better and for improving farming methods.