The increasing global population in the last century has resulted to a massive demand for food production to feed the growing masses. According to Tilman et al (2009), the hunters and gatherer lifestyle was only able to support 4 million people globally as compared to the 6 billion people the agricultural sector has to support today. Farming and agricultural food production has doubled in the past 50 years.
Impacts of farming on the aquatic and terrestrial environment
This has resulted to a 6.87 rise in nitrogen fixation, a 3.48 rise in phosphorous fertilization, a 1.1 rise in cultivated land proportion and a 1.68 rise in the amount of land under irrigation (Tilman, 1999). If a similar trend is observed in the next similar duration, there will be a profound increase in the fixation of major chemical composition of life supporting elements such as nitrogen and phosphorous.