Greenhouse gases continue to rise, says NOAA

The NOAA's latest Annual Greenhouse Gas Index (AGGI) shows that the presence of gases such as carbon dioxide and methane has risen by 29 percent since 1990.

Facebook less popular than filing a tax return

People may be using Facebook more than ever before, but that doesn't mean they like it.

Facebook keeps tabs on users' happiness

Facebook continues in its mission to monitor our wellbeing, expanding its Gross National Happiness Index (GNH) to Canada, the UK and Australia.