Green Options

In a first, researchers at the University of Washington in Seattle have developed a completely tree-powered electrical circuit.

The nano-scale device—approximately 130 nanometers [a nanometer is one billionth of a meter] in size—consumes just 10 billionths of a watt (10 nanowatts).

Unlike the legendary science fair experiment in which a potato-based electric circuit is created using two electrodes (each electrode being a different metal, which react with the starch, causing a potential difference and thus a current), the UW device utilizes electrodes comprised of the same metal, and is able to generate (output) 1.1 volts. “As far as we know, this is the first peer-reviewed paper of someone powering something entirely by sticking electrodes into a tree,” according to paper co-author Babak Parviz, associate professor of electrical engineering at the UW.

The World Agroforestry Centre has recently released a paper titled ” Trees on Farm: Analysis of Global Extent and Geographical Patterns of Agroforestry.” The researchers used five global geodata sets to estimate the percent tree cover on 22 million square kilometers of agricultural land around the world.  They were surprised to find that nearly half of that land had 10% or more tree cover (which is considered “significant” from an agroforestry point of view).  The area involved is vast - as large as the Amazon basin.

Even for North America, the percentages were surprisingly high (39% over 10% cover, 17% over 30%).  Values in Europe were similar. The highest levels are in central America (98% above 10% cover), South America (81%), and Southeast Asia (82%).  Overall, the lowest tree cover is in the most arid areas, but even there >20% of the farmland has 10% tree cover.

Acacia trees, excellent for Africa’s depleted soil and helpful in counteracting climate change, may be the trees of the future for Africa. A very unique tree, it may help Africa in many other ways as well.

Yellowwood                                                     Black Wattle

The destruction of 150 trees by a programme that has made real impacts on South Africa’s environment is regrettable but not really serious, until the underlying cause is questioned.

Removing Invasive Alien Plants

Water is a precious resource in short supply in South Africa. One of the activities directed at the problem is the Work for Water Programme, that works to remove alien invasive species which use large quantities of water unproductively.

Invasive alien plants (IAPs) are those introduced into countries from elsewhere, that then out-compete the indigenous species. They pose a direct threat to biological diversity, water security, the ecological functioning of natural systems and the productive use of land. They intensify the impact of fires and floods and increase soil erosion. IAPs can divert enormous amounts of water from more productive uses.

You’re waiting at a red light, your engine idling lightly. You check the crosswalk signal: 20 seconds, you have some time. You turn your classical music up a notch to the perfect volume and you close your eyes, relaxing on your way home from work. But your moment of relaxation is interrupted by the thump thump of bass coming from the car next to you. You look over at the car, the tinted windows keep you from seeing the driver. [...]

We’ve all heard the legend of Johnny Appleseed, the legendary apple tree planter of the United States. He walked across the country with his walking stick, and a bucket of seeds, just walking and planting as he went. Everywhere he went, apple trees sprouted up. And he was a hero. It is such a hero that Yosemite is looking for now.

The number of large trees is falling in Yosemite National Park, but no Johnny can be found. And the decrease is bad news for many species, including spotted owls, mosses, orchids and fishers (a carnivore related to weasels). These species, as well as others, are losing their habitat with the loss of the trees.

London’s mayor announced a new 2 million tree plan to help fight climate change and keep Londoners cool.

The plan is designed to counteract the “urban heat island effect” in which urban areas absorb and release more heat than surrounding areas, due to having more pavement, traffic and power demand.

June 5th is United Nations World Environment Day. The U.N. Environment Programme has setup a twitter campaign called ‘twitter for trees’. All you have to do is ‘follow’ http://twitter.com/unepandyou and they will plant a tree. The goal is to get 100,000 followers by June 5th. That plants 100,000 trees, so lets get started!

Haiti’s sorrowful rank as the poorest nation in the Western Hemisphere and one of the poorest in the world has been directly attributed to the degradation of Haiti’s natural environment (less than 1.5% of its original tree cover remains intact) as well as a lack of governance structures, underinvestment in social capital, obstacles to private investment, and a spiraling “poverty trap”.

This post was originally published on Eco-Libris blog on April 27.

I love bears. Polar, Panda, Brown - you name it. Therefore I was immediately was fond of our books this week - a children’s book that takes place in a little bears’ heaven and where the main characters are bears (and very funny ones!).

Our book this week is:

The Legend of Honey Hollow

We mentioned it firstly last month when we announced on a collaboration with the author who plant a tree for every book sold on her signing events and provides buyers of the book with our sticker (made of recycled paper), saying: “One tree planted for this book”.

Editor’s note: The following post was originally published on Green and Clean Mom. “Green & Clean Mom can inspire you to try a little harder, be a catalyst for change and to offer you some new tips and news on how to be the green, sexy and sassy mom…I know you are!”

In my local community something is happening that makes me want to jump up, clap for joy and say, “thank goodness”! Children are being encouraged to get outside. Turn off the television and discover green grass, bugs, bond with the trees, smell the fresh air, run and get dirty. It’s an initiative that really shouldn’t have to take place but with television, computers, working parents and technology more children are inside verses exploring the great outdoors. Find out how to locally get involved or start an initiative near you by visiting Getting Kids Outdoors.

The idea is to leave no child inside. I found many helpful tips for parents on a handout given to me at our local health fair and hopefully you can use some of these tips and join in the effort to get our kids off the couch and outside where the rain won’t hurt them and some mud could be fun for everyone!

Limit Screen Time. Designate how often the television can be turned on and stick to it. Avoid using it just for noise. I’m guilty at this. My children love to just have the television on but they’re not watching it. It wastes energy and it’s just noise.