Palm oil (棕榈油) is the most     1     (wide) used vegetable oil worldwide. It’s found in a huge variety of products ranging from vitamins to chocolate and bread. The oil is popular as it has a high melting point and contains healthy fats. The former makes it easy to spread     2     the latter makes it good for our body.

But the oil’s popularity comes     3     a high price. Palm trees need a rainforest and lots of land to grow on. As     4     result, thousands of acres of rainforests in Indonesia, the world’s biggest palm oil     5     (produce), are being destroyed to make room for palm farms.

With half of the world’s palm oil     6     (come) from Indonesia, orangutans (黑猩猩) have suffered a lot there. In the last 20 years, over 80% of their habitat     7     (destroy). What’s worse, in 2015, wildfires caused by illegal destruction of some rainforests endangered two fifths of the remaining orangutans. Palm farms have also threatened     8     (tiger) and elephants and caused water and air pollution.

The easiest solution is to stop using so much palm oil. However, it’s not easy because no other natural oil has both of its qualities. Now scientists are creating a new oil     9     (replace) it by using food waste and M. pulcherrima, a yeast (酵母)     10     feeds on leaves, fruits and flowers.