Learn basic assumptions based on increasingly serious dust pollution
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① understood based on increasingly serious dust pollution, dust pollution, more and more attention, and we chalk dust diffusion and dust pollution and dust pollution hazards and governance discussions.
② dust pollution; chalk expansion
To ③ scattered dust sources; Environmental Protection
④ analysis of how defense chalk dust hazards
⑤ now have large number of emission of many products, but the price is very expensive little flaws we want some breakthrough in this regard
Steps during task stage target
The first phase of online searching for a chalk
The second phase of her mission to design survey program expert teachers know chalk dust harm to human body
The third stage summary of the issues to make a report to make inventions and reaction measures
Keywords：Dust pollution, Environmental friendly chalk
The relevant information
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Export products
![[The foreign trade] Four suction card chalk](/userfile/10001/u21/201655/20160505004930899.JPG "[The foreign trade] Four suction card chalk")
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![[Little chalk] - printing chalk graffiti chalk](/userfile/10001/u21/201655/20160505004928579.JPG "[Little chalk] - printing chalk graffiti chalk")
![[large chalk] chalk chalk - toys marble](/userfile/10001/u21/201655/20160505004928627.JPG "[large chalk] chalk chalk - toys marble")
![[Coarse chalk] printing chalk](/userfile/10001/u21/201655/20160505004927066.JPG "[Coarse chalk] printing chalk")
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