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Tag: sustainable
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Arid land to a fertile Eden: permaculture lessons from Portugal
The land undulates upwards into gentle hills, cradling nooks of fertile terraces growing sweetcorn, sunflowers and tomatoes, before rolling down into tranquil lakes. It looks like a natural Edenic paradise on earth. But 20 years ago this land was arid and barren, and farming was a struggle.
The land is called Tamera, the name given to these 330 acres in southern Portugal by a community of 30 people who moved here from Germany in 1995. Today, 200 people from all over the world live here. Through simple practices of digging swales (ditches) and creating water retention spaces, Tamera’s ecology experts have transformed an area on the brink of desertification – and say they can do the same anywhere in the world.
The community wanted to be more sustainable and grow more of their own food, rather than importing it, and it was clear that water would be central to being able to live autonomously on the land.
“When I came to Tamera in 2006, trees were dying and wells were drying out,” says Bernd Mueller, director of Tamera’s Global Ecology Institute and one of the engineers behind the transformation.
At that time, in the summer months, Tamera looked like a desert with hardly any vegetation. In the winter months, however, there was heavy rainfall and flooding. Mueller and his co-engineer Thomas Lüdert realised that most of the water was running off the soil and causing damage to infrastructure, rather than soaking into the earth.
“It rushed down to the rivers causing erosion and other damaging side effects,” says Mueller. The project’s goal, then, was to retain all the rainwater that falls on the land, to refill the groundwater which was getting lower each year, and to provide flowing spring water.They started from the top of the hills, hit hardest by erosion and overgrazing. “The wind and the water eroded all the fine earth that should serve as a sponge for the rainwater,” says Mueller. “We started to manipulate the situation so these places retain the rainwater falling on them. Then you start to build structures like swales, which fill with rainwater and slowly filter into the earth.”
The lakes were dug out and formed without any concrete seal at the bottom so water can seep into the earth. “There’s a principle in permaculture called the triple S – slow, spread and sink,” says Mueller. “When you have flowing rainwater, something in your ecosystem is wrong. You have to slow it down, spread it over the land and let it sink.”
Transformation of the landscape began in August 2007, and by February 2008 a new spring had appeared at the edge of Tamera’s boundary. “I was surprised. I didn’t expect that to happen so fast,” says Mueller. “We suddenly had a creek going through the valley, and that brought more lush vegetation and animals; wildlife responds immediately to constant access to water.”
The Tamera case study has been presented to the EU and at the UN’s Cop22 in Marrakech by the Global Ecovillage Network. “For us it was important from the beginning to change the situation in Tamera, but do it in a way that it will be a model for the rest of the world,” says Mueller, who has travelled most continents to consult on water projects. “When you scale the ecological problems down to principles, it’s all due to the same mistakes. In all the cases I have seen all over the world, the key to ecosystem restoration is rainwater and vegetation management.”
Mueller has consulted on water management in Israel and Palestine, Turkey, Jordan, Kenya, Togo, Brazil, Bolivia, Colombia, and has shown how the Tamera model can be used in development and humanitarian settings.
After the earthquake in Haiti in 2010, Mueller worked with NGO Cafod on a project at the Carradeux camp for internally displaced people (pdf), providing sanitation, drinking water and waste management. Recommendations for the camp included harvesting rainwater from roofs, providing alternative fuels to wood to prevent deforestation, and installing composting toilets.
“I’m happy to support [Tamera] because they’ve got a different way of doing things,” says Geoff O’Donoghue, Cafod’s operations director who worked with Mueller on the Haiti project. He says that the Tamera approach helps in humanitarian settings because they have an awareness of the bigger picture. “There’s so much you can do which isn’t more expensive, but requires a front-loading of knowledge and design.”
After the consultation in Haiti, the Blueprint Alliance was set up for organisations to share sustainable solutions in humanitarian emergencies.
Mueller also worked with a local government in Kitui, Kenya (pdf). “I witnessed how in a short time a supportive local government could make a programme prompting swale building on a large scale,” he says. “In three months, I couldn’t recognise the land. It was a relatively small amount of money that was invested there. After three years every farmer could see the effectiveness of it.”
So could this approach be used somewhere experiencing extreme drought or even famine, such as South Sudan? The country has similar ecological conditions to Kenya, says Mueller, where he has seen how effective it can be. Mueller is now focusing on showing Tamera’s new water paradigm (pdf) to governments, the UN and NGOs, and supporting community-based projects.
“The ecological knowledge is there and its effectiveness can be proved in so many cases,” he says. “The problem lies in political strategies and social habits.”
On – 01 Jul, 2017 By Anna Leach
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Permaculture Puts Organic Gardening on Autopilot
BY: TIM O’NEAL
Organic food and farming have seen a huge increase over the past ten years, and for good reason. Farming and gardening techniques that use fewer harmful, synthetic fertilizers and pesticides are better for the environment and better for human health. Permaculture methods of growing food reach far beyond these benefits. Growing food organically is just the starting point.
According to a report from 2014 by Stephen Daniells titled US organic food market to grow 14% from 2013-18, 81% of American families reported buying organic food at least sometimes. For many people, the barriers to buying organic food are accessibility and cost. Growing organic produce at home overcomes both of those issues. Permaculture practices are a great way to achieve the best results.
What is Permaculture
Permaculture (permanent + agriculture) was developed in the late 1970s by Bill Mollison and David Holmgren. It’s a set of principles and techniques for food production at any scale that focuses on mimicking natural systems, instead of competing against them. It puts humans into the system as engaged participants, departing from the conventional agricultural approach of conquering nature. The principles can be applied to container gardens on apartment balconies, large scale agricultural operations, and anything in between.
Practitioners of permaculture believe that it is more than a set of gardening techniques. It is the simplest and most direct way we can repair many of the global problems we face today – environmental destruction, poverty and food scarcity, water shortages, among others.
Co-founder, Bill Mollison, says, ““The greatest change we need to make is from consumption to production, even if on a small scale, in our own gardens. If only 10% of us do this, there is enough for everyone. Hence the futility of revolutionaries who have no gardens, who depend on the very system they attack, and who produce words and bullets, not food and shelter.”
From Permaculture: A Designer’s Manual, there are three core tenets:
Care for the earth: Provision for all life systems to continue and multiply. This is the first principle, because without a healthy earth, humans cannot flourish.
Care for the people: Provision for people to access those resources necessary for their existence.
Return of surplus: Reinvesting surpluses back into the system to provide for the first two ethics. This includes returning waste back into the system to recycle into usefulness. The third ethic is sometimes referred to as Fair Share to reflect that each of us should take no more than what we need before we reinvest the surplus.As stated in the third tenet, one central element of permaculture is to return waste back into the system as a benefit. The most direct way to do this is to compost garden and food waste onsite to add nutrients and organic material to the soil. If done well, this can eliminate the need for fertilizers.
There is also a strong emphasis on providing habitat for pollinators, other beneficial insects, and birds. The idea is to mimic a forest setting, or some other mature ecosystem, where pests and diseases are kept in balance by a harmonious relationship among organisms up and down the food chain. With this approach, there’s no need for chemical pest control.
Permaculture concepts can be applied beyond a single garden or farm to include a neighborhood, village, or an entire city. A permaculture system is designed for resiliency. This means that if one element fails the rest of the parts can fill in to keep the overall system intact. A society designed around permaculture principles is built to withstand destructive forces.
While it is a relatively new approach to food production, permaculture relies on concepts from traditional approaches to agriculture. There are methods from all over the world that have been highly productive and sustainable over long periods of time. The revolution of industrial agriculture has worked to eliminate many of these techniques. Permaculture incorporates them back into the modern system to ensure resiliency.
Achieving a productive garden using organic practices is an important goal, for the health of both humans and the environment. Permaculture provides a tested, ethical method for achieving that goal. It also assures us that the benefits of growing healthy food for ourselves isn’t limited to the space of our gardens.
As Bill Mollison says, “If we do not get our cities, homes, and gardens in order, so that they feed and shelter us, we must lay waste to all other natural systems. Thus, truly responsible conservationists have gardens.”
For a great introduction to some permaculture ideas, check out this video by Toby Hemenway.
https://thehomestead.guru/permaculture/
On – 21 Mar, 2017 By The Plaid Zebra
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Renewable Energy – The Precise Facts to Know
In a simple word, renewable energy comes from natural cycles and systems, turning the ever-present energy around us into functional forms. Renewable (alternative) energy is mostly cleaner than energy from nonrenewable options such as natural gas, petroleum, and coal. But right now in the U. S. over many of these of our energy still comes from nonrenewable resources.
Such as the name says, green energy can be refilled continuously. Its sources include radiant energy like sun, thermal energy like geothermal, chemical processes like biomass, gravitational energy like hydropower, and motion energy like wind.
A few of the key sources of power include:
Solar
Solar electricity is able to one day solve much of the energy needs, but that day is still very remote. Still, solar technology has become more efficient and cost-effective every year, and it is the fastest-growing kind of renewable energy.
Wind
Wind power is one of the greenest technologies, and also one of the most abounding and cost-competitive energy resources, rendering it a viable option to the non-renewable powers that harm our health and threaten the environment. Yet wind power is unreliable as a frequent source of electricity, impacts great tracts of land, and it is unavailable where wind is intermittent.
Hydro
Harnessing the kinetic power of moving normal water to generate electricity is the major source of renewable power in the USA and worldwide. Hydropower can be a sustainable and nonpolluting power source that can help decrease our dependence on fossil fuels and minimize the threat of global warming, but is limited to areas with large and regular drinking water supplies.
Bio-fuels
Ethanol is the product of crops full of sugar or starch, while biodiesel is the product of crops with high essential oil content. Both are natural carbon fuel, and both provide practical powers which may have not yet reached their full probable. Scientists continue refining food stocks to obtain higher efficiencies.
Geothermal
Heat from the earth, or geothermal energy, is cost effective, reliable, and clean, but is mostly limited to areas near tectonic plate limits. Some progress has recently been made recently in broadening the range of geothermal resources, but geothermal electric power remains a limited solution to our energy needs.
Ocean
Another form of kinetic power technology, the ocean’s frequent motion by way of dunes, tides, and currents is an effective and clean energy resource. Like other hydro power, though, its geographic range is limited.
Renewable Energy and Environment/Climate Change –
There is general arrangement among the world’s major economies that it is essential to reduce carbon dioxide emissions by 50% by 2050. And with energy-related Carbon Dioxide accounting for 61 percent of global greenhouse gas emissions today, the energy sector must be at the heart of change.
Europe is committed to a 30 percent reduction by the year 2020 and a 60 to 80 percent decline by 2050, under stipulation that additional developing nations also obligate. To accomplish the things, it will require a huge sum of USD 22 trillion in global energy investments over the next 25 to 30 years.
http://greenhoper.net/info/renewable-energy-the-precise-facts-to-know/
On – 10 Feb, 2017 By greenhoper



