题目

There are billions of people on this planet, and many of us love to eat meat. In 2018 alone, the average American will consume more than 100 kgs of red meat, according to a report from the US Department of Agriculture (USDA). At the same time, the environmental impact caused by meat consumption – waste, animal treatment, health issues and even the greenhouse gas effects – has given rise to a number of startups （新兴企业） looking for ways to fill our growing demand for meat. But can the demand be filled in a sustainable and affordable way?A bunch of companies are not only optimistic15. It's usual for mothers to keep on ( compare) their kids with others.