European foresters regarded this practice as harmful for the forests. They felt that land which was used for cultivation every few years could not grow trees for railway timber. When a forest was ...
Chapter 4 (Heat) of Class 7 Science NCERT Book (PDF) is available here for download in PDF format. Download & prepare for CBSE Class 7 Science exam. Chapter 4 (Heat) of Class 7 Science NCERT Book (PDF ...
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