研究者发现，燃料不完全燃烧产生的烟尘，会使发射过程中产生的二氧化碳的排放量减少。
The researchers found that the effect of soot, which is incompletely burned fuel, would dwarf that of the carbon dioxide emissions from the launches.
焰火发射的那一刻就可以按下快门，一直按住不放，直到你要拍摄的焰火完全熄灭，这个过程一般会持续几秒种 。
Hit the shutter as the firework is launching and hold it down until the burst has faded, typically a few seconds.
“围绕太空的传统是，我担忧的东西将离开”罗伯塔·埃里克说，他56岁，一位联合航天的雇员，她监督轨道飞行器的测试并完全参与到多次发射。
"The tradition around space is what I'm worried will go away," says Roberta Wyrick, 56. A United space employee, she oversees orbiter testing and is integrally involved with launches.
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