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A Swedish scientist claims in a new theory that humanity has exceeded four of the nine limits for keeping the planet hospitable to modern life, while another professor told RT Earth may be seeing an impending human-made extinction of various species.
Environmental science professor Johan Rockstrom, the executive director of the Stockholm Resilience Centre in Sweden, argues that there are nine “planetary boundaries” in a new paper published in Science – and human beings have already crossed four of them …. http://rt.com