Carl Sagan > Quotes > Quote > Alyssa liked it

“The hole in the ozone layer is a kind of skywriting. At first it seemed to spell out our continuing complacency before a witch's brew of deadly perils. But perhaps it really tells of a newfound talent to work together to protect the global environment.”
― Carl Sagan, Billions & Billions: Thoughts on Life and Death at the Brink of the Millennium