At present, the rapid development of the economy and excessive exploitation of land and forests can cause damage to the natural habitats of animals and plants, threaten the survival of wildlife, plants, and insects, and lead to the disappearance of biodiversity.
The harm caused by the disappearance of biodiversity:
• •Affects future food sources and industrial and agricultural resources.
• • Soil fertility and water quality are damaged.
• • It affects the ecological balance of nature.
The importance of nature conservation:
Species diversity is composed of various ecosystems, each composed of the environment, animals, plants, microorganisms, and others. All types of plants, animals, and microorganisms play important roles in energy conversion and material circulation on Earth, contributing their indispensable power in maintaining ecosystem balance. China is one of the 12 countries with the richest species diversity, including 34984 species of higher plants, ranking third in the world; 6445 species of vertebrates, accounting for 13.7% of the world; There are about 10000 species of fungi, accounting for 14% of the world. However, at the same time, the degree of threat to species diversity in our country cannot be ignored.
According to the latest published Red Book of Chinese Species, the proportion of endangered species in China that meet the World Union for Conservation of Nature's criteria is 34.74% for invertebrates, 35.92% for vertebrates, 69.91% for gymnosperms, and 86.63% for angiosperms, greatly exceeding the early estimate of 2% to 30%. At present, many ecosystems in China are undergoing continuous degradation and their functions are also constantly being lost; Many populations are experiencing a sharp decline in numbers, and species are in endangered status, with some already below the minimum number of surviving populations.
Biodiversity is the foundation on which human society relies for survival and development. Many aspects of our clothing, food, housing, transportation, and material and cultural life are closely related to the maintenance of biodiversity. Therefore, protecting species diversity is protecting ourselves. If biodiversity is damaged, it will inevitably have a great impact and danger on humans, society, and nature.
The significance of protecting species diversity:
1. Various species provide humans with abundant food, fiber, and energy, as well as a complete range of medicinal herbs and abundant industrial raw materials.
2. Diversified organisms are also important resources for tourism and entertainment.
3. Biodiversity is the air purifier of this world, as trees and other green plants inhale carbon dioxide and reduce it to pure oxygen.
4. Biodiversity purifies water sources for humans, and forests, soil, bacteria, streams, and clouds work together to purify water quality.
5. Biodiversity plays a crucial role in regulating climate and resisting disasters for humans, and forests play a crucial role in mitigating climate change and preventing flood disasters.
10-31
粉尘控制
生产过程中的危害呼吸器官的因素,主要有生产性粉尘和生产性化学毒物两大类。工作场所这两类因素中任何一种或多种浓度超过卫生标准,都会对作业者的健康造成影响。粉尘(尤其是工业性粉尘)是对人体健康造成最大的职业危害因素之一,不是所有的粉尘都会被人体吸收。长期悬浮在空气中的、粉尘颗粒越细的,越容易被人体吸入,特别是小于5μm的呼吸性粉尘,会直接进入肺泡并沉积,导致矽肺病,轻则丧失劳动能力,重则死亡。&nbs
12-14
噪音控制
近年来随着高速公路、铁路、城市轻轨、地铁和工业进入机器时代等的迅速发展,对人们的出行带来了极大的方便和生活水平的提高,但同时它所产生的噪声污染也成了一个突出的社会问题。普遍的传统的方法是用一些声屏障、隔声罩、隔声间等碍障法的方式去解决。这些方法都要在一些特定的条件下进行才能发挥较好的效果,在实际应用中仍有许多问题,例如位置、场地、距离等,这些方法带有针对性、选择性和范围性,而且不明确更不美观。赛科
12-14
自然生态保育
目前经济的快速发展,土地、森林过度开发,会使动、植物自然栖息地遭受到破坏,威胁野生动、植物和昆虫的生存, 会导致生物多样化消失。生物多樣化消失帶來的危害: • 影响未来的食物来源和工农业资源。 • 土壤肥力以及水质遭到破坏。• 影响了自然界的生态平衡。自然保育的重要性
12-14
自然生态净水系统
低成本污水处理系统(自然生态净水系统) 现今概况污水主要有生活污水、工业废水和雨水。生活污水是指居民日常生活中排出的废水,包括城市生活污水和农村生活污水,水中的污染物主要成分有COD,BOD, 氮、磷、硫,致病细菌等。城市污水可经过市政管道进入污水处理厂进行处理,但我国大部分的村庄没有铺设市政管道和建设污水处理厂,大量未经处理的污水直接排放,对水体和土壤造成极大污染,同时污染物经过厌氧微