By David Rothbard and Paul DriessenThousands of politicians, bureaucrats and environmental activists have gathered in Rio de Janeiro for the United Nations Conference on Sustainable Development, which runs through Friday. This time, 20 years after the original 1992 Rio Earth Summit, delegates are minimizing references to “dangerous man-made climate change” to avoid repeating the acrimony and failures that came from the United Nations‘ recent climate conferences in Copenhagen; Cancun, Mexico; and Durban, South Africa. Instead, Rio+20 seeks to shift international focus to “biodiversity” and supposed threats to plant and animal species as the new “greatest threat” facing planet Earth. This rebranding is [...]