Hyderabad, October 19 : Chinese crackers have a near monopoly in Indian market. They sell crackers on a large scale for a lower price as the raw materials were cheap in their country. Even Indian traders are more interested in Chinese crackers which have a lot of varieties that will attract the customers. But these crackers are more polluting than those locally manufactured items.The fireworks are a hit among consumers as they make more noise and attain good heights in the sky because of using banned chemicals. These crackers have an adverse effect on public health also.The pollution control board (PCB) found out that some chemicals were used in the making of Chinese crackers more than the required quantity and banned them. The PCB has warned the traders of taking stringent measures if the sell Chinese crackers.The traders were also ordered not to sell without permission. They were told to take precautions in fire safety issue. The police warned of filing case on those who sell Chinese crackers.Every year more than Rs 2,000 crores worth Chinese crackers will be imported. These goods were being transported into India through major ports on false invoices.