In developing countries, where nitrogen fertilizer is scarce, insufficient plant nitrogen results in low crop yields and limited food supplies. (sciencedaily.com)
If you want to worry about the climate, worry about colder weather and lower crop yields as the sun remains unusually quiet. (firstthings.com)
Since organic agriculture produces lower crop yields than conventional agriculture, it requires more land to produce the same amount of food. (washingtonpost.com)