It was necessary for the wall to go up as a result of terror attacks. The Palestininians as well as the Israelis are suffering from the process of making charcoal and as you can see some smart Palestinian has come up with an idea to reduce the smoke process. The Palestinian man will make a ton of money from his invention and the wall will stay till many more Palestinians will be happy with living beside a Jew.
19-year-old construction worker seriously injured after falling from scaffolding in Harish (Haaretz)
from the article: Polluting Palestinian charcoal wafting west of the Green Line