THIN FILM SOLAR PANELS

Archive for November, 2008

A UK engineer has invented a device that harnesses wave power to pump sea water uphill, from where it can flow downhill to create hydroelectricity, raising hopes of a cheap, abundant source of renewable energy.

In trials, the device, called the Searaser, has pumped water more than 160ft above sea level, using little more than the natural motion of the waves. There are now plans for a much larger version, capable of pumping to a height of more than 650ft.

Inventor Alvin Smith reckons that each full-size device would be able to pump enough water to supply electricity to 470 homes. He also calculates that a fleet of 43,000 could generate enough power for a staggering 20 million households.

Read more of this story »

Many women discover the green lifestyle when they are expecting, or become moms. Wanting to do the best you can for your child includes considerations that you make before your baby is even born – after all, that’s why you’ve given up wine, right? Everyone knows that eating right and getting enough rest will help both mother and baby be healthy, but the green movement has opened our eyes to the effects that the world around us can have as well.

Back in 2005, a frightening study by the Environmental Working Group (EWG) found chemicals in the blood of the umbilical cords from 10 newborn babies. These chemicals were linked to cancer, birth defects, and hormone disruptions, and included lead, mercury and PCBs. Since then, moms-to-be have demanded more information about reducing the impact of the chemical soup that we all live in.

We Are What We Eat

According to most studies, it’s not clear whether organic food has higher nutritional value than its non-organic counterparts. Regardless, one thing is for sure: organic food contains fewer chemicals. Organic food is grown without artificial fertilizers, conventional pesticides, or sewage sludge, and processed without ionizing radiation and food additives. That stuff is gross, whether you’re pregnant or not. To label a food product organic, it must be certified by the National Organic Program, which is run by the U.S. Department of Agriculture (USDA). A USDA Organic seal indicates that the product contains at least 95% organic ingredients, so look for this label.

Eating the fresh fruits and vegetables recommended for everyone, but particularly pregnant women, may also help you to avoid Bisphenol-A (BPA), a toxic chemical found in the linings of food cans. Most recently linked to plastic baby bottles, it can also be found in canned infant formula, as well as canned adult foods like soup, fruit and soda. BPA has been linked to breast cancer and infertility, and there is concern that exposure can affect fetal and infant brain development. Scary stuff, so try to avoid processed foods and stick to real, whole food whenever possible.

Once you have that food home, it’s important to prepare it carefully. Use cast iron or stainless steel cookware – Teflon and other non-stick surfaces have been shown to emit toxic chemicals when preheated to high temperatures, which can occur in just a few minutes. In fact, these chemicals are a known hazard to pet birds, causing lung hemorrhaging and death, so it can’t be good for us either. Particles of non-stick surfaces are also found in food itself.

Most pregnant women know to eat only low mercury fish, avoiding species like tuna and swordfish. For a complete list of sustainable and healthy seafood, download a Seafood Watch card from the Monterey Bay Aquarium. You should also filter your tap water, as pollutants may lurk there. Check out the EWG’s Tap Water Quality Database to see what your city’s water may include, then take a look at our recent post on water filters to help you decide on the one that’s right for you.

Personal Care and Cleaning Products

Without knowing it, we slather chemicals on ourselves in alarming quantities. Women, on average, use 12 personal care products per day. Look for better choices products in the EWG’s searchable Skin Deep Database. The database includes a rating for each product on its developmental/reproductive toxicity, which includes birth defects and developmental delays for children. Phthalates are particularly harmful for boys, while the EWG recommends that everyone avoid perfume, cologne, or products with added fragrance. The database also has a section for products just for kids.

Cleaning products are another key source of toxic chemicals in the home. Whatever you spray on your counters or floors makes its way into your system and thus into your baby.  Check out our selection of eco-friendly cleaning supplies, use plants to clean the air, and open windows whenever possible.

Make Your Nursery a Safe Space

It’s just as important to provide a healthy nursery for your little one! Visit our post on green kids, including green furniture, bedding, low-VOC paints, plus the age-old debate over diapers: cloth or disposable? Be careful when painting or renovating while pregnant, as the chemicals can pass through to your baby.

Let’s Have a Baby Shower

OK, enough of the scary stuff, it’s time to celebrate! Turn your baby shower green by asking for pre-worn clothes and other used goods, or natural products. Check out environmentally-friendly invitations and favors, like those at ecoparti. Request non-plastic items and reusable packaging to inspire guests’ creativity. They can wrap used books in an organic cotton baby blanket, or give a bundle of healthy, eco-friendly baby skin-care products.

Now all that’s left is to actually have the baby!

Written by Brian Liloia, courtesy of GreenBuildingElements.com

When mention of an “earthen floor” is made, one might imagine a dusty, drab dirt floor. Earthen floors are far from this, however; instead they are very elegant, durable, inexpensive, and ecologically sustainable solutions to a typical floor installation. They are varied in construction, but the idea and ingredients are essentially the same across the board. Earthen (or adobe) floors are poured or compacted combinations of sand, clay, straw, and sometimes crushed rock, with pleasantly smooth surfaces resistant to wear and tear, and capable of storing heat from the sun.

There is no one way to construct an earthen floor. They are a natural option for straw bale or cob buildings, but they can even be installed on concrete slabs or preexisting wood floors, as along as the framework is strong enough to support the heavy weight of many buckets full of earthen material.

How to make an earthen floor

A typical earthen floor might include 70% sand, 30% clay, with lots of chopped straw for tensile strength. Oftentimes, they are constructed of two or three layers. My own earthen floor is (or will be, I should say) composed of two layers, the base layer composed of sand and clay at a 3:1 ratio, with handfuls of long straw mixed in for extra strength. (See photo to the right!) This sublayer is 2.5? thick. Once it is dry, the final layer will be installed and smoothed with a trowel, composed of a similar sand to clay ratio, but mixed with very short chopped straw. The sand will be sifted and the clay will be sieved to remove larger particles.

Earthen floors in suburban homes

Some homeowners have even installed earthen floors in their suburban homes, influenced by the low impact nature of an earthen floor. The New York Times has a nice article detailing one family’s earthen floor installation experience. Earth is an environmentally friendly alternative to hardwood flooring (which requires lots of lumber typically shipped over great distances) and carpet (which may offgas dangerous toxins like formaldehyde), making it an appealing option for more eco-conscious homeowners.

Benefits of an earthen floor

Earthen floors can be very easily made using local materials, and are a common sight in traditional housing all over the globe. Materials can be found locally, as close as the ground underneath your feet.

Notably, they are also an excellent option for passive solar homes, due to their thermal mass. For example, the heat of the sun striking the floor in the wintertime will be stored in the mass of the floor, making for a pleasantly warm surface. This heat can also slowly radiate into the living space over time.

To find more eco-friendly flooring options, click here.
To find green builders and contractors near you, click here.

The Toronto Zoo says their 5,000 animals produce enough dung to easily cover the costs of the proposed $13 million biogas-to-power facility within five years.

The plant would produce enough electricity for not only the zoo, but thousands of Toronto households. Similar operations that convert farm animal and human waste into biogas are already in place across the world.

But where does a zoo come up with $13 million dollars?

Read more of this story »

The world’s most powerful supercomputer, the Cray XT Jaguar, is to be to used in the quest to fight global warming and develop renewable energy.

The computer, housed in the National Center for Computational Sciences (NCCS) at Oak Ridge National Labs (ORNL), Tennessee, has been upgraded to a staggering 1.64 petaflops  - and put at the disposal of some of the world’s leading climate scientists and renewable energy experts.

Read more of this story »