In the evening, when the sun sank to the horizon and the sky was dyed a layer of blood red, Xiao Ming sat at the table and ate dinner. Outside the window, car horns blared one after another, and exhaust fumes filled the entire street.
Dad looked at the congested street outside the window, and while serving food for Xiao Ming, he gently persuaded him: "Baby, I know you always want to open the window for a change of air." But it's rush hour, and the car exhaust outside is too polluted.
Those harmful nitrogen oxides can cause damage to our respiratory system if inhaled. Be obedient, for the sake of your own health and that of your family, it's better not to open the window at this time.
Xiao Ming nodded seriously after listening, determined to do what his father said, and no longer open the window during peak hours, so as not to accidentally inhale the toxic substances in the exhaust gas outside.
On this day, dark clouds were thick and heavy rain poured down. The raindrops crackled on the windowsill with a loud sound. Outside, the trees swayed back and forth in the wind, but the room was silent.
Xiao Ming sat on the edge of the bed, looking out the window at the world washed by the heavy rain, and couldn't help but open the window to let the fresh air brought by the rain blow into the house. At first, Xiao Ming felt extremely comfortable, and took a big breath of the moist air outside. But soon, the wallpaper on the wall was full of water and crumpled, and there was a noticeable musty smell coming from the corner.
When my mother saw this, she hurriedly came over and closed the window, and scolded softly: "Look, the walls are all moldy, it's really a headache, it looks like we have to paint it again." Only then did Xiao Ming realize how dangerous it was to open the windows on a rainy day, which would not only breed mold, but also inhale harmful acid rain, which was extremely bad for the body.
When Xiao Ming got up that day, he saw that the sky outside was gray, smoky, and the sunlight could not penetrate the thick haze layer. He opened the window and glanced out, only to see the pedestrians walking in a hurry with masks covered.
Xiao Ming remembered that his father had said not to open the windows on smog days, otherwise he would inhale gases harmful to the respiratory system such as sulfates and nitrates outside. He knew that his father was right, and although it would cause some stuffiness in the house, he reluctantly closed the windows for the sake of his family's health.
As a result, the temperature and air quality inside the house remained good, unaffected by external pollutants. Xiao Ming felt relieved that he had made the right choice to avoid damage to his health.
When night fell, Xiao Ming stayed alone in his room, feeling extremely bored. The heating in the house was turned on so much that it slowly gave off the smell of heating. Xiao Ming really felt that it was difficult to sleep, and he carefully opened a small slit in the window, hoping to let the air circulate outside.
The cold air poured in instantly, Xiao Ming couldn't help but shiver, and quickly closed the window again. Obviously, he was already so careful, but when he woke up the next day, Xiao Ming felt stuffed in his nose, accompanied by an uncomfortable headache. Mom took his temperature, and he had a fever of 38 degrees.
It turned out that just for a short time, the cold air at night still made him catch a cold and fever. While warming Xiao Ming, his mother said, "We can't just open the window when it's cool." Look at the way you feel sick with a cold now, it's good not to open the window.
Only then did Xiao Ming realize the serious consequences of opening the window at night.
Xiao Ming was sick and lay in bed for a day, and his father sat in front of his bed, helping him take his temperature, and said patiently: "We can't just open the window at will for temporary ventilation, so it is easy to catch a cold and get sick." Ventilation is also important, such as opening the windows in the early morning, at noon, after doing housework, when the air is fresh and the rush hour is avoided.
Xiao Ming suddenly realized that there is also the best time for ventilation. In the past, he was always obsessed with purifying the air, ignoring the disadvantages that could be caused by improper timing.
From then on, Xiao Ming opened the windows for ventilation strictly according to the time his father said, which could not only inhale fresh air, but also avoid the invasion of car exhaust and dust. Dad and Mom were relieved to see that Xiao Ming had memorized his words carefully, and their health really had to start from bit by bit.
After that illness, Xiao Ming remembered the time to open the window taught by his father, and no longer opened the window at random during the morning and evening rush hour, rainy days, heavily polluted weather, and night.
He opened the windows for ventilation in strict accordance with the time period recommended by his father, and the air quality was significantly better. Mom was very happy to see Xiao Ming grow tall and healthy.
Now, the family breathes fresh, natural air and no more harmful exhaust fumes, dust and pollutants. A healthy living environment is well ensured. This is all thanks to Dad's careful teaching and Xiao Ming's heart.
Xiao Ming said that in the future, he will continue to follow these principles of open windows, so that his family can stay away from diseases and have a green and environmentally friendly living space.