Futurist Ray Kurzweil notes that solar power has been doubling every two years for the past 30 years — as costs have been dropping. He says solar energy is only six doublings — or less than 14 years — away from meeting 100 percent of today’s energy needs.
Energy usage will keep increasing, so this is a moving target......
But, by Kurzweil’s estimates, inexpensive renewable sources will provide more energy than the world needs in less than 20 years.
Even then, we will be using only one part in 10,000 of the sunlight that falls on the Earth..... Washingtonpost.com
Friday, 26 September 2014
Considering a move to Costa Rica to live off the grid ? Costa Rica's traditions of peace, democracy, and universal education have long attracted retirees and vacation home owners. The nation is also a world leader in ecological preservation, boasting proportionately more square miles of national parks than anywhere else on earth. Costa Rica offers a very low cost of living, while also providing all the modern conveniences.
How about building and living in a Treehouse ? Finca Bellavista
Thursday, 18 September 2014
A sukkah is a structure consisting of a roof made of organic material which has been disconnected from the ground (the s'chach). A sukkah must have 3 walls. It should be at least three feet tall, and be positioned so that all or part of its roof is open to the sky (only the part which is under the sky is kosher.)
The holiday lasts seven days (eight in the diaspora). The first day (and second in the diaspora) is a sabbath-like yom tov (holiday) when work is forbidden, followed by the intermediate Chol Hamoed and Shemini Atzeret. The Hebrew word sukkōt is the plural of sukkah, "booth or tabernacle", which is a walled structure covered with schach (plant material such as leafy tree overgrowth or palm leaves).
The sukkah is intended as a reminiscence of the type of fragile dwellings in which the Israelites dwelt during their 40 years of travel in the desert after the Exodus from slavery in Egypt. Throughout the holiday, meals are eaten inside the sukkah and some people sleep there as well. On each day of the holiday, members of the household recite a blessing over the lulav (closed frond of the date palm tree, bound with boughs and branches of the willow and myrtle trees) and etrog (yellow citron) (Four species).
According to the prophet Zechariah, in the messianic era Sukkot will become a universal festival and all nations will make pilgrimages annually to Jerusalem to celebrate the feast there.(Zech 14:16-19) Rashi in Parashat Pinchas (Numbers, 29:18) writes that the 70 bulls offered whenever the Jewish people are able to offer animal sacrifices, the sum total sacrificed throughout the seven days of the Sukkot festival, correspond to and benefit the 70 national-linguistic groups encompassing all of humanity