For 2012, rank the type of materials in the waste stream to the percentage of municipal solid waste they compromise, by weight before recycling. Rank from 1 (highest percentage) to 5 (lowest percentage).

Food 5

Plastic 1

Explanation:

behaviors of people as well as the rapid advances of technology, amounts and the composition of MSW have been also changed. In a study carried out by the European Environmental Agency to study the per capita annual MSW produced by 32 European countries during 2001-2010, they found that this waste increased in 21 countries, and was decreased in 11 countries. The study also studied the amount of wastes of 26 countries between 2001 and 2008; they found that these amounts decreased in 6 countries. Thus, the amounts and characteristics of the wastes varied from country to another country, as well as from region to region even within the same city according the mentioned factors including the usage habits of people