 We of course have a climate problem in our society, one largely caused now by unrestrained emissions in China. Part of the reason we have that problem is because we're not generating energy much cleaner than we used to 30 or 40 years ago. In fact, the biggest improvement in emissions is solar energy, which can provide a substantial amount of our power, but can't provide anything like 50% of our power, definitely not 100% of our power.