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.
They offer some options that do escalate, so they start at a lower /kWh rate, and then increase 0.3c/kWh every year, so that by year 7 you're higher than what I chose to lock in at. They estimated a system-life savings of around $15,000 versus the $21,000 they estimate for my system. Again, those estimates are contingent on rate increases that they're citing DOE figures on, but which may not pan out as much, so that's something to take into account.