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动植物物种减少的原因 1. 命题中的decline 是什么意思?biodiversity:生物多样性 the number of species in an ecosystem within a certain period of time. 生物多样性：在某一具体时间段内一个生态系中所有物种数目的总和。 种群数：population 2. 原因： l 工业: l 农业: l 人口增长 l 战争 l 都市化 l 灯光 l 道路 l 噪音 l 机场 l 火车站 解决方案： l 基因库 l 自然保护区 l 惩罚力度 l 政府+个人= 政策，宣传，个人具体行动 l 法律+教育 264单词 13个句子。 The key problem is why both the biodiversity and the population in the biota are negatively influenced. Another question the essay attempts to answer is how to effectively address this problem. One of the most alarming reasons is that the increase in human population within the past several centuries exercises adverse impacts on both flora and fauna. Put it in detail, the growth of human population accelerates the development of various industries, including manufacturing, communication, transportation, and building. All these cut the area of habitats栖息地 of the animals and plants. They also pollute the environment. | 
