Anti-Desertification 6000 Km Wall Around Sahara Desert

25 July 2009 | Green News | No Comments

We all know the largest building on the planet, but when it comes to stopping a natural disaster, people are able to do impossible things.For example, desertification problem in Africa has no solution until now.Magnus Larsson,an architect, presented his project this year,about how desertification in Africa could be stopped,at the anual Oxford Conference.To stop this natural disaster the architect was thinking about building a huge wall around Sahara desert.This anti-desertification wall should be 6000 km long, and should be built between Mauritania and eastern Africa in Djibouti.

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New Portable Water Purification Device

30 April 2009 | Green News, Green Technology | No Comments

In a previous post I presented one of the inexpensive ways to purify water, using solar energy(“A basic solar still is a verysimple device.If salty or contamined water is left in an open container, the fresh water will evaporate into the air, separating itself from the salt, dirt, algae, or other organic pollutants in the water.A solar still uses solar energy to speed up the avaporation rate and captures the evaporated water by condensing it onto a cool surface.A solar still, then, is essentially an insulated, dark-colored container or shallow pan, covered by a sheet of clear glass or plastic that is tilted slightly to let the fresh water that condense on it trickle down into a collection through.”http://www.mygreentreasure.com/2009/04/the-sun-can-make-water-safe-to-drink-and-ice-for-many-uses/) .But for few days ago, this invention is competed by a new portable water purification system designed by Ceren Bagatar.
This water puification system is composed of four components: a membrane-type RO (reverse osmosis), a container that keeps dioralyte concentrated solution, another container to hold the nutrient-enriched potable water and a mouthpiece for multi-user usage.The main factor that purify water is the RO system.
“Concentrated dioralyte is then mixed with this potable water to enrich it with nutrients. The designer states that a container full of concentrated dioralyte can be used 15 times to enrich about 500ml of water each time; afterwards the container can either be refilled or replaced with a new one. This purified and enriched water is then stored in a container until it’s used.” – www.ecofriend.org

What is Called as Being Sustainable?

22 April 2009 | Green News | No Comments

The adjective “sustainable” is associated with different terms included under the generous concept – sustainable development.These terms are used in literature, not in a unitary way, so the present text is far from being exhausting.
a)Sustainable system.
To understand the terms in a systemic conception, the concept of “sustainable system” is firstly defined, as the system that survives in a specified period.The sustainable system fulfils the expected life-time, however, no system has an infinite life-time.Thus, the sustainability of systems becomes a matter of predicting a set of surviving conditions for a specified finite time.
b)Sustainable society.
The end of the XX-th century was characterised by the recognition of the trilemma generated by a harmonisation of the economic growth, a distribution of resources and preservation of the environment.A society living in a harmony with nature and with itself is frequently called sustainable society.
c)Sustainable environment.
Sustainable environment – the resources are able to sustain life, health and the development within acceptable limits, on the one hand, and to regenerate itself, on the other one.
d)Sustainable future.
Healthy environment, economic prosperity and social justice, simultaneously responding the purpose of ensuring the well-being and the quality of life for the present and future generations, describe, what is called “sustainable future“.The crucial element to reach this future is education.