food security

Food security exists when all people have consistent access to sufficient, nutritious food for an active life.当所有人都能持续获得充足、营养的食物以维持积极的生活时，粮食安全便存在了。

Climate change poses a growing threat to food security by reducing crop yields in vulnerable regions.气候变化通过降低脆弱地区的农作物产量，对粮食安全构成了日益严峻的威胁。