Russians must make adjustments to the climate in all aspects of their livesâjobs, transportation, food and water supplies, heating, clothing, and plumbing. Keeping warm requires a great deal of energy from oil, gas, wood, or coal. Layers of clothing made of wool or fur protect those who brave the frigid outdoor temperatures. To make machinery and cars, manufacturers must use a special type of steel that will not crack in the cold. Buildings in Siberia rest on pilings 6 to 8 feet off the ground so that heat from within does not melt the permafrost. Which of the following is an opinion rather than a fact about the above passage?