Plates at our planet s surface move because of the intense heat in the Earth s core that causes molten rock in the mantle layer to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again.
PG&E on Wednesday did not offer a specific figure for how much the switch to renewable power would boost electricity rates in 2015. But in the past, the utility has said that rates will rise 1 percent to 2 percent each year as a result.
Aurora-area solar farm reaps $20,000 a month from PGE program. View full sizeMolly Young/The OregonianDan Lever (left) of rural Aurora and Kirk Cameron of Lake Oswego discuss seeding the dusty ground beneath a 500 kilowatt solar panel farm east of Aurora.