And speaking of the World Summit on Sustainable Development — in preparation for the commencement of the event, the New York Times devoted today’s Science section to coverage of international environmental issues. From the impact of human behavior on the global ecosystem to the economics of renewable energy; from reassessing international population growth to our love-hate relationship with nature (dolphins, yes; scorpions, yikes!); from the environmental argument in favor of logging to the nature of disease in a changing world, this special section on “Managing Planet Earth” covers a wide range of issues.