Bamboo and Plastics ( 2010/12/02)
When the plastics we throw away escape from garbage trucks or landfills, they get blown into trees and waterways where they're eaten by animals that mistake them for food. In the North Pacific, a floating island of plastic waste the size of Texas has accumulated, doubling in size over the past six years. Some estimates place the load of plastic floating in that area, killing both birds and aquatic life, at 3 million tons.
Nothing in nature, not even sunlight and oxygen, can break apart the bonds that hold plastic together, so it lingers on our planet indefinitely. Rather than biodegrading, plastic photodegrades into dust, winding up in soil and in the air. In bodies of water, the plastic particles absorb other harmful chemicals such as polychlorinated biphenyls (PCBs) and the pesticide DDT. Those particles then get eaten by fish, which wind up back on our dinner plates.
Bamboo is the fastest growing woody plant on the earth and a species of grass. What distinguish bamboos from other plants are its woody culms or stalks. Some giant bamboo can reach a height of 4-5 meters and with culms up to 20 cm or more in diameter. Others are delicate grass-like plants, and still others are all size in between. Most of the bamboo has round culms, and some very rare species have square culms which is called “Square Bamboo” in Chinese. Their growth rate is as much as 60 cm per day. The bamboo shoots sprang up after the spring rain, people can just watch them growing. Most bamboo live in tropical and subtropical climate and others spread over cooler mountains, like those in southwest China the giant panda are feed on. They occur from 50°N latitude in Sakhalin through to 47°S latitude in Argentina and Chile, reaching their southernmost point there. Major areas with no native bamboos include Europe, North America, Western Asia, and North Africa, Antarctica.
Considering that plastics are made from non-renewable petroleum and natural gas, it's not surprising to know that plastic manufacturing is a major source of industrial pollution. Producing a 16-oz. #1 PET bottle, for instance, generates more than 100 times the toxic emissions to air and water than making the same size bottle out of glass. Major emissions from plastic production processes include sulfur oxides and nitrous oxides (both of which contribute to global warming) and the chemicals styrene, benzene and trichloroethane.
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