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Humans have been using plastic-like materials, such as shellac – made from a resin secreted by lac insects – for thousands of years. But plastics as we know them today are a 20th Century invention: Bakelite, the first plastic made from fossil fuels, was invented in 1907. It wasn't until after World War Two that production of synthetic plastics for use outside the military really took off. Since then, plastic production has increased almost every year, from two million tonnes in 1950 to 380 million tonnes in 2015. If it continues at this rate, plastic could account for 20% of oil production by 2050.
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Content : ยีน
โพสต์โดย : mark
