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I will answer the part of Biotechnology. During this century, most our plants are modified, some genetically others in vitro through cross pollination. The new hybrids are more resistant to pests and diseases in order to reduce the spread of pesticides. Some new plants are drought tolerant, others richer in antioxidants, tastier, more productive and so on. Only through this technology most of the agriculture is able to survive the global warming, the weather changes, including the pollution. Without it, most of the old hybrids would have disappeared like the Panama disease for Banana, Chestnut Blight in the US, ... So the only solution was and still is the Biotechnology for allowing the planted food survival.