What would you do upon receiving that dire warning? Perhaps work to make a change? Lobby the ship’s captain? Maybe you’d simply deny that there was any such connection and keep going about your busy life.But an imminent loss of oxygen just happens to be a current fact, because the ocean’s phytoplankton (which provides two-thirds of the planet’s oxygen) is rapidly dying off. Industrial agriculture not only contaminates our oceans with pesticide and nitrogen-fertilizer runoff, leading to massive dead zones; it is stripping our soils of carbon, which ends up in the oceans and creates acidification. At the current trajectory, in just a few decades there won’t be much left alive in our oceans as the phytoplankton dies—all because of how we grow our food.