Being eco-friendly is not a new concept, but it is certainly taken on a greater sense of urgency in the past few years. With the rising cost of fossil fuels, global warming, and all of the other environmental issues that are coming to light , everyone is looking for ways to reduce their carbon footprint and become more "green." Being energy-conscious can be a good way to help the environment. Turn the heat down, and each degree you turn down the heat saves three percent of heating costs, while each degree you raise the temperature of your air conditioner saves three to four percent of cooling costs. Lower the temperature, and in fact by changing the temperature by two degrees all year, you can save about 2,000 pounds of CO₂a year. Air-dry or hang your clothes instead of using the dryer and save 700 pounds of CO₂a year. Besides using more energy, they are actually dangerous and can cause fires. While most people are familiar with these methods for reducing the impact on the environment, one great way is to replace outdated appliances with more energy efficient models. Most manufacturers are now making their products to the "green" initiative. By changing their manufacturing processes, most manufacturers have found ways to take items that traditionally were not thought of as being "green," and reducing their impact on the environment. One less obvious way to lessen the impact is by buying direct. One thing that people don't consider is where they buy their products. Retail stores utilize a huge amount of resources and inevitably have a huge impact on the environment. Buy products online or direct from the manufacturer, and you are eliminating that high overhead and ecological (生态的) impact. So by simply changing the way you look at your daily habits and the products you buy, you can have a positive impact on your overall carbon footprint.1. The phrase "coming to light" most probably means "becoming ________." (Para. 1)A) settledB) known C) urgentD) serious2. What do most manufacturers do to reduce their impact on the environment?A) Advertise their "green" products.B) Develop CO₂ reduction technology.C) Manufacture more energy-efficient products. D) Sell their products directly to the customers.3. What is the less obvious way for people to contribute to the environment?A) Control CO₂ emission efficiently.B) Update household appliances regularly.C) Make full use of the limited amount of resources.D) Buy products online or directly from the manufacturers. 4. Which of the following practices is NOT helpful to the environment?A) Air-dry or hang your clothes after washing.B) Buy the products we need from retail stores. C) Adjust the temperatures of air conditioners in an economical way.D) Replace the outdated appliances with more "green" models.5. This passage mainly discusses how to ________.A) manufacture more "green" productsB) become energy-conscious and eco-friendlyC) turn down the temperature of the air conditionerD) reduce people's impact on the environment in daily life