At first, it was thought that corrosive acid rain was the chief culprit in destroying the surface of buildings. Experts further study, but found that the most direct cause of wall erosion is that the detergent contained in wall washing every day has an acid corrosion effect on buildings. And why wash the walls every day? Because there is a lot of bird droppings on the wall every day. Why is there so much bird droppings? Because there are many swallows gathered around the building. Why are there so many swallows? Because there are many spiders that swallows like to eat on the wall. Why are there so many spiders? Because there are flying insects that spiders like to eat around the building. Why are there so many flying insects? Because flying insects breed very fast here. The reason why flying insects breed particularly fast here is because the dust here is most suitable for flying insects to breed. Why is this the best place for flying insects to breed? Because the open windows are full of sunshine, a large number of flying insects gather here and multiply supernormally. ...
I found that the solution was simple. Just close the curtains of the whole building. Previously, a complex and detailed maintenance scheme designed by experts became a dead letter. Description:
When dealing with problems, if we can trace the source through the fog and grasp the root of the matter, we can often get great results. Just like the cracks in the Jefferson Building, closing the curtains can solve millions of maintenance costs, which those experts did not expect. Can you really close the curtains when you are in trouble?