Question

conclusion on bad effect of festival on environment

Answer 1

First and foremost is that noise and visual toxicity is the simplest method of destroying the human capacity of spiritual resolution.
When an organisation wishes to indoctrinate a congregation with a gospel of some nature, they begin that process with a whole lot of music, fireworks, visual sensation, and then they have you neutralised for programming.
People then have no real capacity any more to discern correct environmental practises.