New data from the American Lung Association has found that if the U.S. could transition to zero-emission vehicles and an electrical grid powered by clean, renewable energy, it could prevent 2.79 million pediatric asthma attacks and more than 500 infant mortalities by 2050.
With the human population there is in the world today, I am afraid high density cities are necessary. Space is limited, without cities suburbia and villages would cover every square meter of land and there would be no space for the little nature that is still left.