Why is it difficult to ensure only green firecrackers are burst during Deepavali?

The Supreme Court lifting a blanket ban on firecrackers and allowing green firecrackers to be burst for Deepavali, just five days from its order, will be challenging to implement, according to activists and past experiences. 

Over the years, both complete or partial bans on firecrackers have been openly flouted by people in the national capital.