For centuries, saltpeter may be combined with food given it?s a preservative. Before the invention of the refrigerator, kitchens routinely salted meat to hold it edible throughout the long winter time. Today, the traditional cans of corned beef still contain saltpeter ? it has been man?s friend when used in moderation. Saltpeter first emerged in China about 2,000 years ago. Early experiments saw Chinese chemists having the best along with the worst results, according to your point of view. The compost heaps containing decomposing organic matter were covered and spiked with dung and urine. When the resulting "mess" was filtered and wood ash added, this became wonderful fertilizer and also the foundation of fireworks for celebrations. Later, naturally, it made explosives for war. I must also applaud the teachers and organizers of Shilp Encounter for the selection of topics for debate. Topics varied from downsides of Interactive Media, are young netas being a role model for today’s youth, introduction of recreational trips and camps at school trips as being a form a practical learning, an area travelled is more than the usual thousand books read as well as a individual who has not travelled anywhere hasn't experienced life fully.