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全球化和都市化令不少地方的生活模式和飲食習慣都趨向西化。一項新近的研究發現，東非鄉村居民將傳統膳食轉為西方飲食，令免疫系統和新陳代謝變差。相反，飲食西化的城鎮居民改吃以蔬食為主的傳統地道膳食，短短兩星期可見改善健康的效果。
西班牙西北部的自治區加利西亞（Galicia）經常受到野火威脅，但當地的巴羅（Barro）鎮在五、六年前開始卻不再出現這個問題，原因之一是引入了野馬，吃掉易燃的灌木叢，形成天然防火帶。
