tutorial频道

Only half of the calories produced on croplands are available for human consumption. The calories ‘lost’ to inefficiency (49.9%) is enough to support 7.2 billion people. 39.7% of the lost calories are from beef production, which requires 33 calories of feed for every calorie of boneless meat.

2026年3月10日 · 王芳 · 来源：tutorial频道