WHITE RUST

　　I've been in serious trouble about white rust on the aluminium window-frame of my car. I tried to remove it in various ways, but in vain. Recently I found the cause of the rust. Most Japanese car makers adopt stainless steel for the window frames, but on the other hand, European and American manufacturers adopt aluminium. My car, which was produced in the U.S., is also equipped with aluminium window frames and they are easily stained with white rust.
　　I've been wondering why European and American car manufacturers use aluminium for the window frames. I hear that such a white rust phenomenon doesn't happen in the EU and the U.S., so they continue to utilize aluminium for the window frames.
　　I knew its cause from my acquaintance today. Its culprit was yellow sand from China. Actually yellow sand would not exist in the EU and the U.S. The yellow sand generates alkaline rain and this rain seemingly brings white rust on the aluminium window frames. My repulsion against China, which doesn't stop its environmental destruction, was intensified greatly.

(Vocabulary)
I hear .... 聞けば、、、
culprit (問題・難局の) 原因, 元凶; 犯人, 罪人, (不正な行為の) 張本人
repulsion 《[U], a/the ~》(書き言葉) 嫌悪感;[同意] disgust, revulsion