This was a very interesting read. I haven't heard anything about this before. Any permaculture solutions?
http://www.politico.com/agenda/story/2017/09/13/food-nutrients-carbon-dioxide-000511?lo=ap_a1&utm_source=fark&utm_medium=website&utm_content=link&ICID=ref_fark
"The biologists had an idea of what was going on: The increased light was making the algae grow faster, but they ended up containing fewer of the nutrients the zooplankton needed to thrive. By speeding up their growth, the researchers had essentially turned the algae into junk food. The zooplankton had plenty to eat, but their food was less nutritious, and so they were starving."
“Every leaf and every grass blade on earth makes more and more sugars as CO2 levels keep rising,” Loladze said. “We are witnessing the greatest injection of carbohydrates into the biosphere in human history―[an] injection that dilutes other nutrients in our food supply.”