Hydroponics in Schools

In urban centres where the land has been used for buildings and other infrastructure there is little room for production farms, so how do we teach children about farming? Well, we can use hydroponics to grow plants and help people understand why plants and food are so great.

A school in New York City has installed a hydroponic greenhouse that makes use of rainwater to grow plants for their school.

There’s no soil in a hydroponic greenhouse, which captures and recirculates rainwater to the roots of plants. In capable hands — though maybe not in 5-year-old hands — the 1,400-square-foot structure can produce up to 8,000 pounds of vegetables every year. It is an experiment in environmental education its founders hope will be replicated in schools citywide.

Two mothers at the school, Sidsel Robards and Manuela Zamora, founded the greenhouse, inspired in 2008 by a trip to the Science Barge, a floating urban farm docked in Yonkers. They got New York Sun Works, the nonprofit green-design group that built the barge, interested enough to execute the greenhouse, a bright, open and wheelchair-accessible space, covered by glass and entered from the school’s third floor, that is essentially the Barge on a roof.

It includes a rainwater catchment system, a weather station, a sustainable air conditioner made of cardboard, a worm-composting center and solar panels. In the center of the room is a system resembling a plant-filled hot tub: an aquaponics system home to a community of tilapia, whose waste is converted into nitrate. The system loses water only when it evaporates to help cool plants, consuming only a tiny fraction of the water that a field of conventional dirt does.

“You basically can have this closed system, this symbiotic thing going on, where plants are eating food, creating waste, you’re converting it and then the plants are taking it up,” said Zak Adams, director of ecological design at BrightFarm Systems, which designed the greenhouse and the barge.

Read the full article at The New York Times.

Roll-Out Garden

Starting a vegetable garden can be intimidating for some due to the tons of questions that one inevitable has to address. When should plants be planted? What if it’s a seed? How do I know when to pick them? These questions and more have been answered by a neat roll-out garden designed by Chris Chapman.

english designer chris chapman wanted to make planting vegetables and herbs at home less work with his roll-out vegetable mats. the design aims to make home food production as simple as possible and easy to maintain for busy individuals and families. the design features a mat pre-treated with fertilizer on its underside and a series of seed pouches which slowly biodegrade over time. this arrangements allows the plants to develop before coming in contact with nutrients, increasing the chances of germination. the mat is made from corrugated cardboard and come sin a variety of options each suited for different planting seasons. small signs designate which plant is where, making harvesting a breeze.

From Deisgnboom.

Thanks Shea!

World Toilet Day

World Toilet Day is today! For those of you who care about sanitation it’s time to celebrate this campaign to increase awareness of the plight of loos around the world. Access to toilets is a huge issue in poor areas that has cascading effects on all levels of society, particularly women.

It’s great to see this campaign get so much attention and there’s stuff you can do to help out!

WTO which has over 200 partners worldwide, 42 of which are in India is one of the few organisations that focusses only on sanitation and toilets instead of water. “Everyone clubs water and sanitation, and 95% of the funds go towards water projects. But good sanitation is the first step towards clean water,” he says.

Toilets weren’t really top of the pot for Sim, who ran a number of businesses from the age of 25. “When I turned 40, I realised that I had 13,000 more days to live the average Singaporean lives to 80 and wanted to do something useful,” he says. Sim started reading and “realised that the toilet is really neglected”. So he started “the other WTO” in 2001 to disseminate serious facts with a sense of humour. The logo is a toilet seat shaped like a heart. “I thought the best way to break the toilet taboo was to use lots of puns.” But the name, which everyone thinks is “really bad at first” sticks in people’s minds. “That’s because every mother has told her child not to talk about the toilet. It’s not polite’. And here we are talking about the loo quite freely,” says Sim, who is often called Toilet Man.

And it’s not just about getting toilets installed. “You have to keep them clean too. So Sim has started the World Toilet College in Singapore that provides training in toilet maintenance and design. “I’m hoping we can open one in India too to train toilet cleaners like technicians.”

Read more: The big squat’ to take a stand on sanitation

Solar Snow Removal

It should come to no surprise that the sun melts snow and ice. Indeed, one of the reasons we have such severe climate change is because the energy from the sun isn’t being reflected off of snow (the albedo effect).

Some enterprising researchers have proposed that we capture the energy the sun is tossing at us by using roads to store energy that can be later used to melt snow or provide energy. Imagine all the roads in North America as an energy source!

“We have mile after mile of asphalt pavement around the country, and in the summer it absorbs a great deal of heat, warming the roads up to 140 degrees or more,” said K. Wayne Lee, URI professor of civil and environmental engineering and the leader of the joint project. “If we can harvest that heat, we can use it for our daily use, save on fossil fuels, and reduce global warming.”
The URI team has identified four potential approaches, from simple to complex, and they are pursuing research projects designed to make each of them a reality.
One of the simplest ideas is to wrap flexible photovoltaic cells around the top of Jersey barriers dividing highways to provide electricity to power streetlights and illuminate road signs. The photovoltaic cells could also be embedded in the roadway between the Jersey barrier and the adjacent rumble strip.
“This is a project that could be implemented today because the technology already exists,” said Lee. “Since the new generation of solar cells are so flexible, they can be installed so that regardless of the angle of the sun, it will be shining on the cells and generating electricity. A pilot program is progressing for the lamps outside Bliss Hall on campus.”
Another practical approach to harvesting solar energy from pavement is to embed water filled pipes beneath the asphalt and allow the sun to warm the water. The heated water could then be piped beneath bridge decks to melt accumulated ice on the surface and reduce the need for road salt. The water could also be piped to nearby buildings to satisfy heating or hot water needs, similar to geothermal heat pumps. It could even be converted to steam to turn a turbine in a small, traditional power plant.

Read the rest at Physorg

The Story of Electronics

The Story of Electronics is brought to us by the same woman who made The Story of Stuff.

There is also a section on action that you can take and it’s already made a differnece!

From their blog:

Inspired by The Story of Electronics, hundreds of people sent letters to Lenovo President and CEO Rory Read yesterday, telling the company to green its products and “Make ‘em Safe, Make ‘em Last, and Take ‘em Back.” Within hours,Read got back in touch to say he “could not agree with [us] more.”

We’re excited that Lenovo wants to do better, but with their weak track record on responsible recycling and failure to follow through on a commitment to get PVC and brominated flame retardants out of their products, we’re not ready to take them at their word just yet.

The Story of Electronics