Rock This: West Virginia’s governor, Joe Manchin (D), announced that the state now has an official state rock: Coal. Grist Plugged In: Toyota will start leasing its plug-in hybrid by late 2009. AP New Lease on Life: The Earth could last 2.3 billion more years, say experts at Caltech, extending previous estimates by more than 1

billion years. Wired Gracias: Mexican billionaire Carlos Slim is investing $100 million to help his country go verde . AFP   Dam It: Brazilian officials approved a permit for a hydroelectric dam in one of the Amazon River’s biggest tributaries, provoking concern among environmentalists. Reuters –Avital Binshtock

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Daily Roundup: June 4, 2009