What we put into the atmosphere in terms of burning fuel is unprecedented.

Never before have we known what we know.

The burning of fossil fuels has altered the amount of carbon dioxide in the atmosphere so rapidly and so abundantly that now, we are driving not just the warming trend, not just the sea level rise that is a consequence of the warming trend that is melting polar ice and alpine ice, but also [ocean acidification].

The end of commercial fishing is predicted long before the middle of the 21st century.

We have an atmosphere that is roughly 21% oxygen. The rest of it is largely nitrogen. There's just enough carbon dioxide (CO2) to drive photosynthesis. That has been, throughout the history of our species, pretty stable. Until recently.

The Earth is a unique system in the universe, the only planet we know of that's hospitable for humankind.

This much is certain: We have the power to damage the sea, but no sure way to heal the harm.