 numbers' expression
If a chopstick is about 20 cm3, we will consume 500 m3 of wood just by using this single-use item. That is about 10,000 trees with an average height of 5m and an average diameter of 10cm. Let’s also pretend that we plant a single tree every 3m, then more 100,000 m2 of forest are disappearing every year just because people in one college use single-use chopstick in their three meals every day.
I feel very unsure of the expressions of numbers above. Could you give me some editings? It is kind of urgent. Thanks very much.
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