Make the following sentence negative: 1)The amount of each material used LEADS to different styles of building. 2)The other main ingredients INCLUDE more or less sand/gravel and straw/grasses. 3)Titanium CAN BE USED for structural purposes, but it is much more expensive than steel. 4)They PROVIDED humans with the ability to both let light into rooms while at the same time keeping inclement weather out-side. 5)Clear windows HAVE BEEN USED since the invention of glass to cover small openings in a building. 6)Plastics VARY immensely in heat tolerance, hardness and resiliency. 7)Concrete HAS BEEN the predominant building material in this modern age due to its longevity, formability, and ease of transport.