Every time you make coffee, dry the leftover coffee grounds and keep them in small bowls, then place the bowls in the kitchen.

每次你煮咖啡的时候，把剩下的咖啡渣虑干放进小碗里，然后把碗放在厨房里。

youdao

Sprinkle your used coffee grounds in the garden and around the outside of your house.

把你用后的咖啡渣撒在花园里和你房子的周围（房子外面）。

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Used coffee grounds, in moderation, can do wonders for the garden by adding nitrogen to the soil.

用过的咖啡渣，通过适量地在土壤中加入氮来对花园产生好的作用。

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The diesel-extraction method for coffee grounds is similar to that used for other vegetable oils.

ECONOMIST: Monitor

According to the ACS, Starbucks Hong Kong produces nearly 10 million pounds of spent coffee grounds annually.

FORBES: Starbucks To Turn Stale Pastries Into Plastic?

Commercial production could be carried out by a company that collected coffee grounds from big coffee-chains and cafeterias.

ECONOMIST: Monitor