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B. Packaging materials typically make up only a small proportion of the weight of household  garbage, but a relatively large proportion of its volume. 

C. Per-capita sales of products sold in paper and cardboard packaging are lower in rural areas  than in urban areas. 

D. The new conservation regulations were motivated by a need to cut down on the consumption  of paper products in order to bring the harvesting of timber into a healthier balance with its  regrowth. 

E. It is not known whether the dioxins released by the burning of household garbage have been  the cause of any serious health problems.