5.2 understand the effects on crop yield of increased carbon dioxide and increased temperature in glasshouses

Glasshouses: glass building used to grow plants in an enclosed environment

Carbon Dioxide:
- CO2 concentration can be controlled as glasshouses are enclosed.
- farmers can burn paraffin lamps to increase CO2 levels.
- an increase in CO2 levels allows more photosynthesis to take place.
- more photosynthesis means the plants will grow bigger and faster, increasing crop yield.
BUT! As the concentration of CO2 increases beyond a certain point, the crop yield will halt. Farmers will need to balance the level of CO2 so it is at its optimum.

Temperature:
- the heat from the sun can be trapped to create a warmer climate
- the increase in temperature towards optimum will allow optimum enzyme activity for photosynthesis-related enzymes. If the activity of these enzymes increase, crops will grow bigger and faster, thereby increasing crop yield.
BUT! If the temperature increases above the optimum temperature, enzymes will denature and photosynthesis levels will decrease, and crop yield will decrease.