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Some people say that the main environment problem of our time is the loss of particular species of plants and animals. Other say that there are more important environmental problems. Discuss both these views and give your opinion. Nowadays, world are threaten by a plethora of environmental problems, some group argue that extinction of creatures is the crucial issue, while other people, including me, argue that there are other matters which menace seriously our environment. To embark on, extinction of biodiversity is crucial problem because it lead to changing balance of ecosystem and diminishing other organism, which in turn result in disruption of food chain. As the number of species in a food chain decreases, there are fewer sustainable alternatives for members of the food chain that had depended on the extinct species. For instance, extinction some insects have negative effects in flower pollination which in turn result in a decrease in the number of plants. However, scientist are trying to preserve some kinds of animals and plants in zoos and botanical gardens and have achieved successful results. For example, they use captive breeding in order to increase number of especial animals such as rhinos or rare birds. Conversely, global warming, discards plastic and ozone depletion are threaten our life on the earth. Global warming cause raising rising average temperatures in the earth and melting land-based ice. As a result see level will increase so that some islands and beach shrink and not only humans but also flora and fauna, lose their habitat. Also widespread discard of plastics threatens our environment because birds and animals die gruesomely through being caught up in plastic. Moreover, increasing UV radiation injures plants, animals and marines and human life. It was occasioned by the ozone depletion which acts as an invisible shield and protects us from harmful ultraviolent light. In conclusion, I believe, although extinction of biodiversity is an environmental issue which threatens the food chain, we are faced with crucial factors such as global warming, discarded plastic as well as ozone depletion in world that menace dangerously both our habitat and our food.