TOP 100 CAMPING SITES
| |||
|
| |||
| |||
|
| |||
| Essentials | Lower Volga, Russia Travel tips for Lower Volga, Russia travel.nytimes.com |
Green Role Model: Metro Taxi Is Driven to Save Driven to SaveMetro Taxi [More] rss.sciam.com |
Is Northwestern India's Breadbasket Running Out of Water? The fields of barley, rice and wheat that feed much of India are running out of water, according to a new study based on satellite data and published online in Nature today. The heartland of last century's Green Revolution lost 109 cubic kilometers of water from its Indus River plain aquifer between August 2002 and October 2008. ( Scientific American is part of the Nature Publishing Group.) [More] rss.sciam.com |
Just How Sensitive Is Earth's Climate to Atmospheric Carbon Dioxide? Carbon dioxide levels climbing toward a doubling of the 280 parts per million (ppm) concentration found in the preindustrial atmosphere pose the question: What impact will this increased greenhouse gas load have on the climate? If relatively small changes in CO 2 levels have big effects--meaning that we live in a more sensitive climate system--the planet could warm by as much as 6 degrees Celsius on average with attendant results such as changed weather patterns and sea-level rise. A less sensitive climate system would mean average warming of less than 2 degrees C and, therefore, fewer ramifications from global warming. [More] rss.sciam.com |
With One Space Observatory Down, NASA Uses Another to Map CO2 SAN FRANCISCO--The Orbiting Carbon Observatory, or OCO , was designed to monitor the movement of carbon dioxide in Earth's atmosphere starting this year, but instead it plunged into the ocean in February due to a launch malfunction. Now an instrument on another NASA probe is enabling researchers to map atmospheric CO2, and revealing that its global distribution is surprisingly uneven, with regional variations of up to 5 percent. [More] rss.sciam.com |