Read the two texts.
Text 1
For many people, homeownership is too expensive, but an eleven-foot-tall 3D printer just might be the solution. In under twenty-four hours, this 3D printer can pour layers of specially blended concrete to create a five-hundred-square-foot home. Inside are two bedrooms, a living room, and a kitchen and bathroom with fully functional plumbing. At a fraction of the cost of traditional construction, this 3D printing technique offers an ideal possibility for families that may not be able to afford traditionally built houses. That means more people could soon have homes of their own.
Text 2
When old, unsafe buildings are demolished, builders can salvage some of the old materials to help cut costs in new construction projects. In fact, reclaimed building materials can be fifty or even seventy-five percent cheaper than new ones. Simple construction materials like lumber and bricks can often be reused. But even kitchen appliances, bathtubs, light fixtures, and fireplaces can find new homes. In addition, building contractors often have leftover materials from past jobs to sell at a discount or give away rather than discard.
Which sentence best combines the main, or central, ideas of both texts?
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