Cement industry and its environmental impacts | PPT
Pakistan has inexhaustible reserves of limestone and clay, which can support the industry for another 50-60 years. The annual production of the cement at the time of the creation of Pakistan was only 300000 tones per year. By 1954 the production increased to 660000 tones per annum against a demand of 1000000 tones. 6. .Web
قرأ أكثر