A perfect storm of fire and ice may have led to snowball Earth

From the HARVARD JOHN A. PAULSON SCHOOL OF ENGINEERING AND APPLIED SCIENCES Explaining a ‘once-in-a-billion-year event’ What caused the largest glaciation event in Earth’s history, known as ‘snowball Earth’? Geologists and climate scientists have been searching for the answer for years but the root cause of the phenomenon remains elusive. Now, Harvard University researchers have…

Renewable Energy, what is the cost?

By Andy May A key question to think about, do renewable fuels decrease fossil fuel use, or do they increase it? What are the costs of using renewable energy? The sun and wind are free, does that make wind and solar power free? Biofuels require power to plant crops, make fertilizer and spread it, harvest…