Câu hỏi:

Read the passage and answer the questions

Paper makes up about 28 percent of solid trash in landfills and one ton of paper takes (1) ___________ about 3.3 cubic yards of landfill space. Recycling paper and cardboard saves space in landfills for trash (2) ___________ cannot be recycled and saving space in landfills reduces the need to build more landfills. Many communities oppose the building of new landfills in their neighborhoods.

   Recycling one ton of paper saves (3) ___________ equivalent to the energy needed to power the average U.S. home for six months and saves about 7,000 gallons of water. Making recycled paper into new paper products saves energy and water (4) ___________ the number of energy-intensive steps and processes that use water are reduced.

Question 4: