The United States in 1972 banned DDT after the pesticide thinned bald eagle eggshells and pushed the national bird toward extinction; decades later, eagle populations recovered enough to be removed from the endangered species list in 2007

Nature can recover when harmful human pressures are reduced, but understanding ecological damage still requires careful investigation. According to the US Fish & Wildlife Service, in the mid-twentieth century, the United States witnessed a quiet disaster unfolding across its waterways and skies.

Raccontata datimesofindia.indiatimes.com