Most banks have tightened lending, choking off needed credit for some US businesses.
With enough investment, geothermal power could satisfy 10 percent of the US energy diet, energy experts say.
Proposed high-rise greenhouses could help solve a looming food crisis, professor says.
Accomplished and outspoken, they’re likely to tackle climate change head-on.
Once thought to be waste, rice husks now can be used as clean, cheap fuel for developing countries.