最后的问题(16)

"A very good point. Already, mankind consumes two sunpower units per year."
"Most of it's wasted. After all, our own Galaxy alone pours out a thousand sunpower units a year and we only use two of those."
"Granted, but even with a hundred per cent efficiency, we can only stave off the end. Our energy requirements are going up in geometric progression even faster than our population. We'll run out of energy even sooner than we run out of Galaxies. A good point. A very good point."