Today, the rapid growth of urban population accelerates the increment of waste in cities, causing a series of environmental pollution issues in the world.
To cope with it, many countries make positive efforts to recycle urban waste that destroys ecological environment.
China sets itself an ambitious goal to build model recycling cities and raise the recycling rate of renewable resources 75 percent in large and medium cities until 2020.
Lanzhou of Gansu Province is leading others in developing the recycling industry.
It set up permanent and mobile procurement shops in various places to purchase diverse kinds of renewable waste from residents. The waste is classified and transported to factories to be turned into new products.
For example, factories produce various commodities with the waste from the procurement shops, including various forms of packing sheet, dustbins, plastic chairs and rubber pipes and boards.
The strictest waste sorting measure has been in force in Shanghai since July 1, while Beijing, Zhejiang and Hunan provinces and other regions show great concern over the recycling of different sorts of waste from construction process and kitchens.
Ho Chi Minh City of Vietnam plans to reduce the quantity of vinyl mesh bags used by locals by 65 and 50 percent at shops and markets respectively as compared to 2010 and to recycle at least 40 percent of household waste.
Can Tho City intends to recycle solid waste from families 100 percent between 2020 and 2030. A power station in the city generates 150 000 kWh of electricity a day by burning 400 tons of solid waste.
The Russian government set a goal to increase the dirt disposal rate which is under 10 percent to 60 percent by establishing a civilized and safe waste disposal and recycling system. For the present, it gave a relevant sector a detailed task of increasing the recycling rate of waste by 38 percent till 2020.
St Petersburg reportedly installed 53 000 dustbins to retrieve dangerous waste.
A city in northern Europe generates electricity for heating by using waste.
It is reportedly said that 52 percent of waste is used to produce energy, 43 percent is retrieved or decomposed and unharmful 5 percent is buried.