Impact of global warming will be more so, if people do not immediately limit air pollution, mainly from industrial and transportation. Coz for food only, each man has contributed to the pollution as much as 2 tons of carbon dioxide (CO2) per year.

That number already includes various stages of preparation of food, ranging from cultivation, processing, packaging to distribution and sales. Of the total emissions produced by humans each year, the stages that pollution contributes about 20 percent.

The experts from the Universidad de Almeria (UAL) concluded after examining the influence of food consumption patterns in Spain with the level of environmental pollution. Conclusions are published in international journals Life Cycle Assessment.

"Within a year, each person produces 2 tons of carbon dioxide pollution from food and energy spent about 20 gigajoule to process it," said Ivan Munoz, one of the researchers.

Emissions of carbon dioxide is the most widely produced from livestock, such as meat and milk processing. Agriculture, fisheries and food processing industry also includes primary sources of environmental pollution.

Besides polluting the air, food processing also contaminating waste waters, especially with nitrogen and phosphorus. Even the natural waste of human (poo) also sources of water pollution.

In the water, the organic material on human waste become the source of nutrients for the algae. The result is a boom or explosion of algae growth which makes levels of dissolved oxygen depleted and smells.
Fortunately, human waste is also a fertilizer for other crops that reproduce the occurrence of photosynthesis. One product of photosynthesis is oxygen which more or less to neutralize carbon dioxide emissions from food.