Gratitude to Sarah at Worldchanging for putting this together:

As renewable energy technologies become more competitive, investing in them is becoming a more viable venture. Yet, uncertainties about cost and ROI are still keeping some investors at bay.

Wind blows, rain falls and the sun shines, but differently at different times and locations, making wind, hydroelectric and solar power dependent upon weather and climate systems. A new Northwest-based energy efficiency company, 3TIER, is using their science skills and computer smarts to remove some of that guesswork.

[Read entire story at Worldchanging.com]