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Plastic and paper bags from retailers are taxed 7-cents per bag. Tax does not apply to bags with a retail price of at least 50¢. [52] [53] Chicago repealed the ban it had passed April 30, 2014, that went into effect starting August 1, 2015. Reusable bags were defined as being at least 2.25 mils. [54] [55] City of Edwardsville: April 1, 2020 ...
A 50 cent plastic bag levy was implemented on 1 April 2015 across Hong Kong. The use of plastic bags dropped 90% after the introduction of the levy. [79] Signs show that Hong Kong is phasing out the use of plastic bags at a dramatic rate. A sign proclaiming that polythene bags thinner than 30 μm are prohibited in Kasaragod, Kerala, India.
Plastic bags were found to constitute a significant portion of the floating marine debris in the waters around southern Chile in a study conducted between 2002 and 2005. [29] Plastic bags don't do well in the environment, but several government studies have found them to be an environmentally friendly carryout bag option.
In North America and Europe per capita plastic consumption was 94 kg and 85 kg/capita/year, respectively. China reached 58 kg/capita/year. [44] In 2012, 25.2 Mt of post-consumer plastic waste was collected in the European Union. Of this, more than 60% (15.6 Mt) was recovered and 40% (9.6 Mt) was disposed of as municipal solid waste (MSW).
Polyethylene was first synthesized by the German chemist Hans von Pechmann, who prepared it by accident in 1898 while investigating diazomethane. [12] [a] [13] [b] When his colleagues Eugen Bamberger and Friedrich Tschirner characterized the white, waxy substance that he had created, they recognized that it contained long −CH 2 − chains and termed it polymethylene.
HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]
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