
| GENVA: Scientist have found that some reservoirs formed by hydroelectric dams emit more greenhouse gases than expected, potentially upsetting the climate-friendly balance of hydroelectric power. |

| GENVA: Scientist have found that some reservoirs formed by hydroelectric dams emit more greenhouse gases than expected, potentially upsetting the climate-friendly balance of hydroelectric power. |

| WASHINGTON:When it comes to protecting the privacy of their children, US parents give social networks a failing grade. |

| SAN FRANCISCO: A PayPal application that lets people deposit checks by scanning them with cameras built into iPhones was considered a budding success on Friday. |

| WASHINGTON: The US space agency NASA announced it has given the green light to a mission to Mars aimed at investigating the mystery of how the "red planet" lost its atmosphere. NASA gave the approval Monday for "the development and 2013 launch of the Mars Atmosphere and Volatile Evolution (MAVEN) mission," the agency said in a statement, noting that the project may also show Mars' history of supporting life. |


