The Moon is a ball of left-over debris from a cosmic collision that took place more than four billion years ago. A Mars-sized asteroid - one of the countless planetesimals that were frantically churning our solar system into existence - hit the infant Earth, bequeathing it a very large natural satellite.
When wireless cellphones first came out, analysts predicted that at peak, it would only replace 5% of landlines. They said the quality wasn't good enough. Clearly that was improved. I think you'll find a similar thing in solar.
Producing fuel cells and solar panels requires high tech facilities and produces high paying jobs. The industry is booming in Arizona. The state already has about 100 firms in the solar industry and has grown 20% since 2003.
Wind and solar power are land-intensive, a green sin, but not energy-dense, and affordable only when heavily subsidized. And wind power must be supplemented with hydrocarbons for reliability.
I hope climate science becomes the big thing. And then what I want is electrical engineers to solve the world's energy problems, energy distribution problems. I want mechanical engineers to make better transportation systems. I want chemical engineers to develop better solar panels, and so on.
For example, a breakthrough in better batteries could supplant hydrogen. Better solar cells could replace or win out in this race to the fuel of the future. Those, I see, as the three big competitors: hydrogen, solar cells and then better batteries.
Consumers used to think they had to compromise with solar. It was, 'Okay, I'm doing the right thing for the environment; it's cool to see the panels. I have to compromise on the cost and convenience side.' And now they no longer have to. On the cost side, it's cheaper, and on the convenience side, we set it all up.
We live in a world bathed in 5,000 times more energy than we consume as a species in the year, in the form of solar energy. It's just not in usable form yet.
'Easter' is a movable event, calculated by the relative positions of sun and moon, an impossible way of fixing year by year the anniversary of a historical event, but a very natural and indeed inevitable way of calculating a solar festival. These changing dates do not point to the history of a man, but to the hero of a solar myth.
Solar power is the last energy resource that isn't owned yet - nobody taxes the sun yet.