Circulation. The difference is like between a rainforest and semi-desert. Efficient regeneration of tissues. Of course other factors matter. Air quality, varie

Circulation. The difference is like between a rainforest and semi-desert. Efficient regeneration of tissues. Of course other factors matter. Air quality, variety of foods, water sources, sleep patterns, noise, stress, ecology in general. There is nothing new about these notions - actively working peasants in unspoiled remote areas are champions of longevity.