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As is depicted in the picture entitled “cries from our descendants”, a boy is calling on his ancestors — citizens today throughout the world — to ensure a better environment and a greater abundance of natural resources for future generations. With a forced smile on the face, he is crying bitterly and desperately. Such a scene can just put us deep in thought.The drawer of the picture intends to force us to ask ourselves some very thought provoking questions concerning nature conservation.In fact, the kind of behavior that destroy environment has caused many negative effects on our life.We will tell you that the following example:Severe Tropical Cyclone Pam struck Vanuatu as an extremely destructive category 5 cyclone on the evening of 13 Mar 2015, causing serious damage to infrastructure and leaving debris strewn across the capital. (OCHA, 15 Mar 2015) As of 26 Mar, the storm had affected around 166,000 people on 22 islands who are in need of some form of humanitarian assistance. Approximately 15,000 homes have been reported to be destroyed or damaged throughout the provinces of Penama, Malampa, Shefa and Tafea, and 75,000 are in need of emergency shelter.Following severe inundation from storm surges and sea swells generated by TC Pam, the Government of Tuvalu declared a State of Emergency on 13 Mar. Seven islands have been affected. The worst affected were the northern islands of Nanumaga and Nanumea, and the central islands of Nui and Vaitupu.The main impacts are to shelter, infrastructure, food crops and livestock, and water and sanitation. The Kiribati Government reported severe damage in its three southern islands following high winds and sea surges from TC Pam, while in the Solomon Islands, there have been reports of inundation and damage to islands in Malaita and Temotu Province. IFRC estimates that more than 30,000 people are affected.Shelter, water, food and first aid are urgent priorities and the Vanuatu Red Cross is working closely with local authorities and other stakeholders to support the government-led response, according to the federation.Images of local media reports show that after Tropical Cyclone Pam passed, downed power lines, uprooted trees and blown roofs were scattered on Port Vila's streets.Change of course to the west sent Pam directly at populated areas. The U.N. Office for the Coordination of Humanitarian Affairs said there were unconfirmed reports of 44 more deaths in Vanuatu's northeastern islands after Pam drifted from the track that had been forecast.People fleeing the storm's wrath flooded into more than 20 evacuation centers that were filled with thousands of evacuees, government officials said. They awoke to much calmer weather Sunday, but many who ventured out around Port Vila have found their homes damaged or blownaway altogether.There are reports on dozens of deaths in Vanuatu's Penama Province, where the cyclone made its landfall, but the country's National Disaster Management Office could not immediately confirm those reports as communication with northern provinces was downAid officials said the disaster could be one of the worst the Pacific region has ever experienced. UNICEF said the cyclone affected at least half the population of Vanuatu, including about 54,000 children. Oxfam said water, sanitation and hygiene supplies were an urgent priority."Pam" is generated in the vicinity of the equator, about 10 degrees south latitude waters, SST is relatively high."Pam" dynamic condition is very good. From the divergence of view, there is a stream in the south of it, "Pam" is the "strong aspiration". By the "PAM" low-level "inflow" effect is also very strong. Its formation on the north side of the site as the equatorial westerly wind belt, however, after the formation of "PAM", but airflow to the strength of the jet import, Zhang Ling pointed out that in the equatorial westerly belt is not common.From the point of view of the structure of "PAM", it belongs to a boss small compared to the typhoon (tropical cyclone), which is conducive to it under the premise of maintaining the structure, shape stability, fast absorbing energy.In "PAM" generation, active during that time. In the north there is typhoon "Zimbabwe". To its west is tropical cyclone "Nathan". In a relatively short period of time, the adjacent areas exist multiple typhoons (tropical cyclone) that may be related to the effect of the strength development of "PAM".The report of current environmental issue - climate change in the world. The damage caused by it is unknown.。