Tag: Energy

Energy and Power

The time has come, the walrus said, to talk of many things. And I say it’s time to address a few recent comments. Let me begin with Akshay’s comment:

Quoth he:

You are right that energy is not an immediate limit to growth. While total energy usage today is about 20 TW (20E12 Watts), solar energy received by Earth at any given time is about: pi * R^2 * Solar_constant = 3.14 * 6.378E6^2 * 1.361E3 = 173843 TW. So, yes there is enormous room for growth in energy usage.

Them are impressively large numbers. It makes my brain numb. But let me being. Continue reading “Energy and Power”

World Water Day 2010

Today is World Water Day. Having evolved in a watery world, nearly all life on earth needs water to survive. In the short run humanity is going to face an acute shortage of water. But not in the long run. Continue reading “World Water Day 2010”