This episode focuses on the role of photosynthesis in greenhouse farming. 

It highlights how lighting and heating can be manipulated to boost photosynthetic rates, thus increasing crop yield. However, farmers face a crucial economic decision because artificial lighting and heating systems are costly. 

The key lies in finding a balance between investment in these technologies and the potential gains in crop production. 

Understanding these limiting factors and trade-offs is essential for optimising plant growth and profitability in a greenhouse environment.

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