Looking ahead, and some are just a bump on the ground, large tracts of forest were cut down, into people's lives in the wood products. It is only for their own interests, many animal it to become destitute and homeless. This is not a false illusion, this is the bloody facts.Once upon a time, a large number of animals and plants in the world were destroyed, and many animals and plants are on the verge of extinction, which is why? This is because the man casually trees, destroy the ecological environment, this is the fundamental reason.Land resource is one of the three major geological resources (mineral resources, water resources, land resources), is the most basic human production activities and labor objects. Human utilization of land reflects the development of human civilization, but also caused the direct destruction of land resources, which is mainly manifested as unreasonable cultivation caused by soil erosion, land desertification, land salinization of soil and soil pollution and so on, and the soil and water loss is particularly serious, today the world is facing a serious crisis. According to estimates, soil loss of the cultivated land is about 230 tons / year.Some people think acid rain is a silent crisis, and in the history of the impact our most serious threat to the environment, is a look at the enemy. This is not alarmist. With the increase in industrialization and energy consumption, acid emissions are also increasing, they enter the air, after a series of role in the formation of acid rain.Although the red tide has been in ancient times, but with the rapid development of industrial and agricultural production, water pollution is increasingly serious, the red tide is becoming more serious. Since the first report of our country in 1933, there have been a total of 194 large scale red tides, which only 4 times in 1994, 157 in 1990. Oil pollution has great harm to water quality and aquatic life. Oil floating on the surface can rapidly spread, the formation of oil film, hinder the surface and air contact, so that the dissolved oxygen in water. Oil containing polycyclic aromatic hydrocarbons, which can be enriched by aquatic organisms and endanger human health. Sulfur dioxide is mainly produced by the combustion of sulfur substances such as coal and fuel oil, followed by nature, such as volcanic eruptions, forest fires, etc.. Sulfur dioxide on the human body of the conjunctiva and the mucous membrane of the upper respiratory tract is strongly irritating, can damage respiratory tract can cause bronchitis, pneumonia, and even pulmonary edema and respiratory paralysis. Short term exposure to sulfur dioxide concentration of 0.5 mg / cubic meter of air in the elderly or chronic mortality increased, the concentration is higher than 0.25 mg / cubic meter, can cause respiratory diseases in patients with deterioration. The long-term exposure to the concentration of 0.1 mg / cubic meter of air breathing system diseases. In addition, sulfur dioxide for metal materials, housing construction, cotton knitwear, leather and paper products easily cause corrosion, spalling, fade and damage. Can also make the plant leaves turn yellow and withered.Protect environment, responsibility. 放眼望去，有的只是凹凸的地皮，大片大片的树林遭人砍伐，变成人们生活上的木制品。人们只为一己私利，使成群的动物流离失所，奔向它方。这并不是虚假的幻想，这是血淋淋的事实。 曾几何时，世界上大批的动植物遭到灭绝，还有许许多多的动植物濒临灭绝，这都是为什么？这都是因为人类乱伐树木，破坏了生态环境，这才是根本原因。 土地资源是三大地质资源（矿产资源、水资源、土地资源）之一，是人类生产活动最基本的资源和劳动对象。人类对土地的利用程度反映了人类文明的发展，但同时也造成对土地资源的直接破坏，这主要表现为不合理垦植引起的水土流失、土地沙漠化、土地次生盐碱化及土壤污染等，而其中水 土流失尤为严重，乃当今世界面临的又一个严重危机。据估计，世界耕地的表土流失量约为230亿吨／年。 有人认为酸雨是一场无声无息的危机，而且是有史以来冲击我们最严重的环境威胁，是一个看不见的敌人。这并非危言耸听。随着工业化和能源消费增多，酸性排放物也日益增多，它们进入空气中，经过一系列作用就形成了酸雨。 赤潮虽然自古就有，但随着工农业生产的迅速发展，水体污染日益加重，赤潮也日趋严重。我国自1933年首次报道以来，至1994年共有194次较大规模的赤潮，其中60年代以前只有4次，1990年后则有157起。石油类污染对水质和水生生物有相当大的危害。漂浮在水面上的油类可迅速扩散，形成油膜，阻碍水面与空气接触，使水中溶解氧减少。油类含有多环芳烃致癌物质，可经水生生物富集后危害人体健康。二氧化硫主要由燃煤及燃料油等含硫物质燃烧产生，其次是来自自然界，如火山爆发、森林起火等产生。二氧化硫对人体的结膜和上呼吸道粘膜有强烈刺激性，可损伤呼吸器管可致支气管炎、肺炎，甚至肺水肿呼吸麻痹。短期接触二氧化硫浓度为0.5毫克／立方米空气的老年或慢性病人死亡率增高，浓度高于0.25毫克／立方米， 可使呼吸道疾病患者病情恶化。长期接触浓度为0.1毫克／立方米空气的人群呼吸系统病症增加。另外，二氧化硫对金属材料、房屋建筑、棉纺化纤织品、皮革纸张等制品容易引起腐蚀，剥落、褪色而损坏。还可使植物叶片变黄甚至枯死。 保护环境，人人有责。
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