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sun’s heating on snow surface． soot’s increased absorption of solar energy． carbon-dioxide’s warming effect． snow’s increased reflection of sunlight．
excess stresses will not be set up in the boiler the decks will not be covered with soot the soot will be swept toward the uptakes there will not be a loss of steam pressure
Write a letter. Ask for permission. Use more electricity. Install new low-soot fireplaces.
Soot Snow Greenhouse gases Wind
Just in case someone asks. Scientists like to take tests. Scientists are not very busy. To keep track of pollution levels.
Ice sea areas． Areas with black carbon． Areas covered with white snow． Melting glaciers．
选择不同燃油型号与烟灰的粘性无关 使用含有氧化铁的燃油添加剂 , 将使烟灰粘性增加 烟灰的粘性减小可对废气流速的限制向上“浮动” A,B,C都是错误的
X sea ice and insufficient sunlight． light snow cover and sufficient sunlight． heavy snow cover and sufficient sunlight． thick sea ice and insufficient sunlight．
They could lose their homes. They pay for the punishment. They get sick from the smoke. The fire could get out of control.
The fire could burn you. It’s not healthy to be too warm. Harmful chemicals are released in the soot. The smoke is filled with unseeable tiny pieces.
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