Can you imagine a world without fish? Sven Huseby, descendant of Norwegian fishermen and life-long environmentalist, had never done so until he read an article on ocean acidification — The Darkening Sea. The article changed his life. He discovered that the effects of climate change are not limited to global warming; they extend to the sea, where the chemistry of the water is being changed and is creating a profound threat to the whole food chain, starting at the bottom.

Huseby and his partner and wife, director Barbara Ettinger, decided to create a feature-length documentary about the issue. After two years in production, thousands of miles of travel, and hundreds of hours of editing, A Sea Change: Imagine A World Without Fish will be completed in December 2008.

When we think about urgent threats to our environment, the images which come to mind are smokestacks and automobiles belching pollution into the sky, contributing to the climatic warming we are experiencing on earth. What many of us don’t know, is that the pollution — which is excess carbon dioxide —doesn't stay in the atmosphere. In fact, a large proportion of the atmospheric carbon dioxide is absorbed by the oceans where it becomes carbonic acid as it dissolves in water.

This results in abnormally elevated levels of carbonic acid that changes the seawater chemistry by lowering the pH and making the ocean more acidic. This in turn decreases the available calcium carbonate essential for formation of bones in fish, shells on crustaceans and reef material from corals.

The pH balance of the oceans has changed dramatically since the beginning of the Industrial Revolution: there is now a 30% recorded increase in acidification. With near unanimity, scientists now agree that the burning of fossil fuels is fundamentally reshaping ocean chemistry. Experts predict that over the next century, the steady increases in carbon dioxide emissions and the continued rise in the acidity of the oceans will cause most of the world's fisheries to experience a total bottom-up collapse - a state that could last for millions of years.

Rob Moir, Executive Director of the Ocean River Institute, explains that, "A Sea Change could not be more timely. I believe acidification of our oceans is actually a greater threat to our survival than is temperature or sea level rise, the conventional "global warming" threats".

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