Learn to Sail

OK, so here's another one of my Apocalyptic posts (see previous post on Learning Morse Code), but this could also help the environment. While there are many people out there who know how to sail and who do so regularly, there are many, many more who don't know how and who would be completely lost if Gasoline were to suddenly disappear and all engines were to suddenly stop working. Granted, there are certain places in the world where travel by wind power is not feasible, but for the most part it's something you can rely on. The most important thing to know is that you CAN travel against the wind. That's right, you simply need to angle your course at approximately 45 deg. to the headwind, set your sail at a slightly more acute angle and as the wind passes from the front to the back of your ship it will create lift over your sail which will pull you forwards. Any sailor will tell you that the slowest way to sail is directly with the wind because then you can only travel as fast as the wind (typically 5-10 knots in my area) but if you travel at angles to the wind you can go much faster. I'd really like to see some innovation out there in the use of sails and cargo ships. Imagine how much fuel consumption could be reduced if tankers carried their cargo using wind power and battery powered turbines when near port.