This intriguing soil combination called “biochar” was first used hundreds of years ago by indigenous people of the Amazon River when they added a mixture of charred organic materials to their soil, creating vast and fertile farmland that is still some of the richest soil on Earth today.

“The idea is that by putting char in the soil you can increase the fertility of that soil,” Bibens said.

As evidenced by Terra Preta, biochar can stay in the soil for hundreds, maybe thousands, of years, sequestering carbon, increasing crop yields and possibly improving water quality.

According to the International Biochar Initiative, because it is so stable, adding biochar to soil increases retention of nutrients so that less fertilizer is needed and therefore less is released as pollution.

Read more from the Daily Green.

When a historic seminary in the heart of Manhattan went searching for a way to cut its energy costs in an environmentally friendly way, it didn’t turn to the heavens for sun or wind power but sought salvation in an unlikely direction for a religious institution. It looked underground.

Tapping the energy stored in the Earth, The General Theological Seminary plans to construct the largest geothermal project on the East Coast; large enough to supply water to heat and cool the seminary’s 275,000 square feet of space.

Currently, geothermal power accounts for only half a percent of the nation’s energy generation, but that is likely to double in the next few years with 103 new plants under construction. The Renewable Energy Laboratory estimates that if all the heat trapped up to 2 miles under the U.S. were tapped, it could generate enough electricity to meet all of the country’s power needs for 30,000 years.

Read more in the Chicago Tribune online.