【一块牛肉的绿色之旅】北京西南的房山区窦店村，有一个正在运转的绿色循环，在“作物喂牛、牛粪肥田”的循环模式下，这里的高品质牛肉送上了高档餐桌、送进了学生食堂，不仅环保而且实现了村民增收。让我们跟随记者走进田间地头，看看这块牛肉背后的故事。#涌动的中国经济# In Beijing's southwestern Fangshan District, Doudian Village runs a green cycle: crops feed cattle, and manure enriches the soil. Richer land produces better crops and high-quality beef for restaurants and school cafeterias — benefiting the environment and local livelihoods. Join us to explore the story behind the beef. http://t.cn/AXfbUxqg