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Revision as of 12:07, 3 October 2017
Background
Brief Introduction
There is one thing people are longing for: a greener world. However, ever since industrial revolution, our environment has been facing an increasingly overwhelming situation: air pollution, energy shortage, global warming…
Among all the environmental problems, management of waste is a big issue, especially food waste. According to FAO, nearly 1.3 billion tons of food including fresh vegetables, fruits, meat, bakery, and dairy products were lost along the food supply chain in 2012 (FAO, 2012). In addition, the amount of food waste has been projected to increase in the next 25 years due to economic and population growth (Melikoglu et al., 2013).
Food waste occupies a great portion of the total waste. And because of its complex composition, food waste is the type of waste which is very hard to dispose or utilize. Furthermore, without proper management, food waste will do tremendous harms to our environment and health. Countries all over the world are making great efforts to solve this problem; however, there is still a long way to go.
We Produce Massive Amounts of Food Waste
Food waste (precooked and leftover) comes from various sources, particularly from food production industries and daily household. Annually, developed and developing countries produce massive amounts of food waste (Fig. 1). In China, the most densely populated country, the food waste reaches a striking amount of 195 million tons each year (Fig. 1b). All over the world, food produced on approximately 1.4 billion hectares of fertile land (28% of the world's agricultural area) is lost or wasted (Paritosh et al., 2017). Therefore, effectively dispose those huge amounts of food waste has become a must.
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