We are all modern witnesses to both the miraculous and the incomprehensible. We have seen our planet from space, had access to the deepest canyons of the ocean, deciphered the infinitesimal DNA structure of life, and discovered unimaginable species—but we’ve also seen our own destructive influence on the planet’s complex network of life.

Nowhere is this more evident than with the current state of the world’s oceans.

Besides the devastating impact of overfishing, habitat destruction and ocean pollution, climate change is modifying the chemistry of the oceans in a way that has not been seen for tens of millions of years.

There is no controversy about this, it’s just basic chemistry. Nor is there any question that increased acidity is fundamentally altering the ocean’s essential functions, such as regulation of the earth’s climate system or absorption of carbon.

The actual process of ocean acidification greatly decreases the ability of many marine organisms, such as coral reefs, to build their shells and skeletal structures, which provide the foundation for one of the most biologically diverse ecosystems in the world.

If we lose our precious corals, we will set off a deadly chain reaction causing extinctions of the important organisms that inhabit and depend on the reef systems. This will make the reefs less diverse, less resilient and far less productive for the hundreds of millions of humans who rely on them for food, protection and livelihoods. And when the loss of coral reefs is coupled with sea level rise, this will lead to the mass displacement of coastal populations, to increased world hunger as a result of depleted fisheries and other forms of food production, not to mention the decreased availability of fresh water in many parts of the world.