<i>&quot;Plant physiologist Shigeharu Shimamura wanted to explore ways that man could keep up with the ever-increasing food demand while bypassing the risks brought on by drought, crop disease and natural disasters.&quot;</i><p>Unfortunately, growing lettuce isn&#x27;t going to keep any people alive if drought, crop failures or natural disasters occur, since lettuce is mostly water by weight and has low amounts of macronutrients (2.23g carbs and 1.35g protein per 100g lettuce).[1] I wonder how much harder it would be to produce crops like rice or beans indoors?<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Lettuce#Nutritional_content" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Lettuce#Nutritional_content</a>