The most important part of Diwali is tradition of fire works which gives color, lighting and noise. We can see brilliant display of fire works in different form of color and design when the crackers are exploded. The three days people celebrate night and early morning exploding the fire works. People distribute sweets to friends and relatives and exchange gifts.
During olden days people lit the house with earthen diyas, but modern world people consume much of the electricity. And crores of rupees will become ashes because many people burnt the crackers which leads to environmental pollution and toxic chemicals used in the crackers releases the toxic gases and which will harm people, many people get injuries at the time of bursting of crackers.