Reuters: Costa Rica's leading opposition group, PAC, expected to win a four-year presidential term next month, will drop the country's commitment to carbon neutrality by 2021, an official said. The leftist group's candidate, Luis Guillermo Solis, should be elected president in an April 6 runoff vote after ruling party candidate Johnny Araya announced on Wednesday that he was abandoning the campaign. "We don't think it would be possible to reach carbon neutrality by 2021, because the most important tasks...