Case in point - here's what happens when you put the copy and paste an excerpt of my artificially translated second post content directly into google translate:

空氣污染對人的影響各不相同。一些影響是顯而易見的，如心血管問題。 空氣污染也可能引起眼睛刺激，或增加心髒病發作或癌症的風險。 事實上，空氣污染可能是全球癌症的首要原因。

主要罪魁禍首: 小粒子 “PM”
有多種類型的空氣污染。小顆粒污染是最危險的。我會把小顆粒稱為“PM”。“PM”由液體和固體的微小材料組成。. 最危險的“PM”的尺寸只有2.5微米。 這些小顆粒很小，使它們深深的粘在你的肺部。這很難呼吸。此外，您的肺部吸收有毒物質進入血液。

"The impact of air pollution on people varies. Some of the effects are obvious, such as cardiovascular problems. Air pollution may also cause eye irritation, or increase the risk of heart attack or cancer. In fact, air pollution may be the primary cause of global cancer."

"The main culprit: small particles "PM"
There are many types of air pollution. Small particle contamination is the most dangerous. I will call the small particles "PM". "PM" consists of liquid and solid micro-materials. The most dangerous "PM" size is only 2.5 microns. These small particles are so small that they stick deeply into your lungs. It's hard to breathe. In addition, your lungs absorb toxic substances into the bloodstream."

That took about an hour to achieve - whether it turned out to be incorrect in a way which is not apparent from the translation process is not clear to me.