Documentary : Pollution : The Science Guy (must watch)

This episode doesn’t stink, even though it’s about pollution. Dirty water, land, and air are a result of pollution. People are the only animals on Earth that make pollution. Garbage, burning fuel, chemicals, sewage, oil, and pesticides are all human-made things that make the Earth’s atmosphere, water, and soil unclean. Humans are even leaving trash in space, such as broken satellites, pieces of metal, paint from rocket skin, and even cameras and toothbrushes.

Many of the junk people make and leave behind hurts plants, animals, you and me. In some places, the Earth is becoming a real mess, and humans are the only ones who can start cleaning it up. Instead of dangerous chemical pesticides, some farmers are getting bats to help keep insects off their crops. Recycling helps lower the amount of garbage that gets buried in landfills. Some companies have reduced the amount of packaging on their products. Humans make pollution, and the amount of pollution depends on the choices people like you and me make. Sometimes, to leave the world better than you found it, you have to clean up other people’s trash. Be sure to clean up your messes and watch the “Pollution Solutions” episode

William Sanford “Bill” Nye, popularly known as Bill Nye the Science Guy, is an American science educator, comedian, television host, actor, writer, and scientist who began his career as a mechanical engineer at Boeing. He is best known as the host of the Disney/PBS children’s science show Bill Nye the Science Guy and for his many subsequent appearances in popular media as a science educator.

Eco-Preservation : Used CDs to clean Sewage Water


The Taiwanese team’s complete wastewater treatment device is approximately one cubic foot in volume. In addition to the zinc oxide-coated optical disk, the device consists of a UV light source and a system that recirculates the water to further break down the pollutants.

The research team tested the reactor with a solution of methyl orange dye, a model organic compound often used to evaluate the speed of photocatalytic reactions. After treating a half-liter solution of dye for 60 minutes, they found that over 95 percent of the contaminants had been broken down. The device can treat 150 mL of waste water per minute, the researchers say.

The spinning disk reactor is small, consumes little power, and processes contaminated water more efficiently than other photocatalytic wastewater treatment methods, Tsai says. The device could be used on a small scale to clean water contaminated with domestic sewage, urban run-off, industrial effluents, and farm waste. Going forward, the team is also working on ways to increase the efficiency of the reactor, and Tsai estimates that the system could soon be improved to work even faster, perhaps by creating layers of stacked disks.

Courtesy and Source : Read MoreĀ The Optical Society (2013, September 23). Spinning CDs to clean sewage water.