Inter Press Service: The last 50 years have seen an unprecedented and unsustainable spike in consumption, driven by a culture of consumerism that has emerged over that period, says a report released Tuesday by the Worldwatch Institute. This consumerist culture is the elephant in the room when it comes to solving the big environmental issues of today, the report says, and those issues cannot be fully solved until a transition to a more sustainable culture is begun. “State of the World 2010”, …