求翻译：造纸业是一个高污染行业，少用纸张是环保的重要方面之一,我国的贫困人口还相当多，新课本费用对贫困学生来说是不小的负担是什么意思？

Paper is a high-polluting industries, less paper is an important aspect of environmental protection is one of China's poor population is also considerable, the cost of new textbooks for poor students is not a small burden

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The papermaking industry is a high pollution profession, little uses the paper is one of environmental protection important aspects, our country's impoverished population quite are also many, the new textbook expense to the impoverished student is not the small burden

Paper industry is a highly polluting industry, using less paper is one of the important aspects of environmental protection, poverty in China's population is quite large, cost of new textbooks to needy students, is no small burden

Paper industry is highly polluting industries, one using less paper is environmentally important aspects, my poor also considerable, new textbook costs for poor students are no small burden