Recruiting Plankton to Fight Global Warming:
Mr. Buesseler has organized a conference for the fall to bring together the experts in ocean fertilization to assess the years of research in the field and see what might be done to further it. He also wants to explore the policy issues; one unresolved question is whether regulatory bodies will even endorse iron fertilization as a valid means of carbon sequestration that would be allowed under any so-called cap-and-trade system to limit global warming gases.
"So-called"?