Around 2bn birds were killed within two years of China’s “Four Pests” campaign during Mao Zedong’s Great Leap Forward. One working paper suggests that the policy inadvertently killed millions of people, too https://t.co/ZKaIL0hNmz ...

But China could calibrate a trade “quarantine” to limit unintended consequences https://t.co/oahR43k5tC ...