in the atmosphere. The way in which farms are grown, in tandem with the seasonal carbon cycling of various crops, could alter the impact carbon in the atmosphere has on global warming. Wheat, rice, and soybean crops account for a significant amount of the increase in carbon in the atmosphere over the last 50 years. Poorly regulated applications of nitrogen fertilizer that exceed the amount used by plants, such as broadcast applications of urea, results in emissions of nitrous oxide, a potent greenhouse gas, and in water pollution. Dependence on non-renewable resources Most high intensity agricultural production is highly reliant on agricultural machinery and transport, as well as the production of pesticides and nitrates that all require energy. Nitrogen fertilizer is a direct fossil fuel product processed primarily from natural gas. It is estimated that no more than 3.7 billion people of the current world population could be fed without this single fossil fuel agricultural input. Moreover, the essential mineral nutrient phosphorus is often a limiting factor in crop cultivation, while phosphorus mines are rapidly being depleted worldwide. Land use A 2021 study found that the Green Revolution led to a reduction in land used for agriculture. Health impact Studies have found that the Green Revolution substantially reduced infant mortality in the developing world. A 2020 study of 37 developing countries found that the diffusion of modern crop varieties "reduced infant mortality by 2.4–5.3 percentage points (from a baseline of 18%), with stronger effects for male infants and among poor households." Another 2020 study found that high yield crop varieties reduced infant mortality in India, with particularly large effects for rural children, boys and low-caste children. Consumption of pesticides and fertilizer agrochemicals associated with the Green Revolution may have adverse health impacts. For example, pesticides may increase the likelihood of cancer. Poor farming practices including non-compliance to usage of masks and over-usage of the chemicals compound this situation. In 1989, WHO and UNEP estimated that there were around 1 million human pesticide poisonings annually. Some 20,000 (mostly in developing countries) ended in death, as a result of poor labeling, loose safety standards etc. A 2014 study found that Indian children who were exposed to higher quantities of fertilizer agrochemicals experienced more adverse health impacts. Punjab case A Greenpeace Research Laboratories investigation of 50 villages in Muktsar, Bathinda and Ludhiana districts revealed that twenty percent of the sampled wells had nitrate