5.2 Crop Yield

1. We're looking at the increase of crop yields due to higher levels of carbon dioxide and higher temperatures. 
2. This can be related to the rate of photosynthesis. 

Increasing concentration of Carbon Dioxide: 

1. Carbon dioxide is the substrate within photosynthesis. 
2. The rate of photosynthesis will increase therefore we'll have a higher yield up to a point. 

Increasing the temperature 

1. Yield increases until we reach the optimum temperature. 
2. increasing temperature in a glasshouse also has other effects such as avoiding frost damage and provide  constant temperature, contributing to the yield growth.