Bija Devi had a tough time recently explaining what gehu (wheat) was to a group of German students who had come all the way to her farm to learn about what they thought was a long-lost variety of wheat.

Bija Devi’s seed bank at her farm near Dehradun in the foothills of the Himalayas has over a thousand varieties of ‘lost’ cereals, pulses, fruits and vegetables, and over 500 varieties of rice alone, though she’s clueless about their scientific names.

Bija Devi (as she is known) has worked as a farmer since she was seven, has never been to school and isn’t sure about her own age (she says she is in her early 40s).

Switch Off Incandescent Bulbs, Switch on CFL by Pattrick Savarna.

Many science led inventions and discoveries provided us with great relief and relaxation. However, the same innovations, gifted us their negatives also, though being projected as boons for mankind. The traditional light bulbs too can be the best suitable example in this regard.

The traditional light bulbs or incandescent bulbs despite helping the world come out of darkness have threatened, constantly, to add continuous menaces to an already on-the-edge eco-system.

Video (1min 47sec): A Concrete Solution for Global Warming.

Cement is one of the most consumed materials on the planet. It's the foundation for our roads, our sidewalks and our cities. It's also one of the biggest contributors to global warming. But a new product could change that.

Janine Van Deventer, inventor: "You can make it feel just about the same.

But in addition to that it's got a jigh fire resistance, up to almost a thousand degrees centigrade, and it is strongly acid resistant which is very good.

Video (2min 33sec): Four Environmental Decisions President Obama Can Make on Day One.

Sierra Club's Executive Director Carl Pope outlines the four decisions President Obama could make on day one of his administration to reverse the actions of the Bush Administration and set America on a new course for the 21st Century.

These 4 decisions are: 1) End the Rush to Build New Coal Plants. 2) Direct the EPA to Approve State Plans Requiring Clean Cars. 3) End Mountaintop Removal Mining and Enforce Clean Water Act. 4) Restore America's Leadership in the Fight Against Global Warming.