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Forest-our lifeline Worksheet-5  Multiple-Choice Questions: A negative impact of the use of modern technology is that: (a) economic opportunities are frequently limited (b) international trade is limited (c) contacts with other cultures decrease (d) levels of air and water pollution often increase  The relatively thin layer on the earth (Answer given below) MCQs Q1: The covering of large trees that serve as a roof to shelter an area or other plants in forests is called _____. Worksheets have become an integral part of the education system. Worksheet for Forests Our Lifeline Class 7 Science In this page we have forest our lifeline class 7 worksheet . 3. CBSE chapter-wise worksheet papers with solution for class 7 Science chapter Forests Our Lifeline for free download in PDF format. Class 7 Forests Our Lifeline Long Answer. 2. 7th Science chapter Forests Our Lifeline have many topics. 1. 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