One of the Iranian festival detained annually on the thirteenth day of the first month of the Iranian calendar is Sizdeh Bedar, which people spend time picnicking outdoors, known as the Nature Day but unfortunately, most of the people do not care about nature. Last time when my family and I went for this visit this festival, took some food and as convenience used many bottled water. After finished it, we collected all our garbage. With great regret, most of the people dropped many trash and bottles of water in nature. There was a naturalist, who said each garbage needs to take time for disintegrating in nature, for example for a can is 90 years, plastic is more than 700 years, aluminum is 495 years and glass is 1,000,000