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S., down from more than 87 million tons in 2000, according to the U. Paper products used by the packaging industry were responsible for about 77% of packaging materials recycled, with more than 24 million pounds recovered in 2005.By 1998, some 9,000 curbside recycling programs and 12,000 recyclable drop-off centers existed nationwide.Up to that time, paper manufacturers had used discarded linen rags for paper, but supply could not keep up with the increased demand.
Paper suitable for recycling is called "scrap paper", often used to produce moulded pulp packaging.
The industrial process of removing printing ink from paper fibres of recycled paper to make deinked pulp is called deinking, an invention of the German jurist Justus Claproth.
Recycling paper decreases the demand for virgin pulp, thus reducing the overall amount of air and water pollution associated with paper manufacture.
Recycled pulp can be bleached with the same chemicals used to bleach virgin pulp, but hydrogen peroxide and sodium hydrosulfite are the most common bleaching agents.
This is enough electricity to power a 3-bedroom European house for an entire year, or enough energy to heat and air-condition the average North American home for almost six months.
Recycling paper to make pulp actually consumes more fossil fuels than making new pulp via the kraft process; these mills generate most of their energy from burning waste wood (bark, roots, sawmill waste) and byproduct lignin (black liquor).
However, the increase in junk mail is still smaller compared to the declining use of paper from those sources.
The environmental impact due to excessive use of paper has negative effects on trees and forest.
Recycled pulp, or paper made from it, is known as PCF (process chlorine free) if no chlorine-containing compounds were used in the recycling process.
In the mid-19th century, there was an increased demand for books and writing material.