How relevant is Rachel Carson's 1962 book 'Silent Spring' today?

As relevent as it was then. We live in a "Closed Environment" if we turn it into a "Sewer" we will be living in a "Sewer". And if the "Sewer" we create is not compatible with most of life on this planet, we are doomed. It's about as simple as that. Poke a big enough hole in the bottom of your boat and guess what.............it will sink ;-) TommyTrouble