How to treat soil diseases

**Foreword** "Soil is too important for human survival and development. It's not only related to food security, but also closely tied to the entire ecological environment," said Zhou Jianmin, a member of the National Committee of the Chinese People's Political Consultative Conference (CPPCC) and president of the Nanjing Branch of the Chinese Academy of Sciences. He emphasized that soil is directly linked to sustainable human development. The United Nations has declared this year as the International Year of Soils, aiming to draw global attention to soil conservation. Soil protection is one of the key environmental concerns for Zhou Jianmin during this year’s two sessions. As an expert in soil conservation and a long-standing member of the CPPCC, he has repeatedly submitted proposals on preventing soil pollution and protecting arable land at the National People's Congress. In response to soil pollution, Zhou suggested that relevant departments should develop more reasonable evaluation criteria and scientific treatment methods to address "soil diseases." One of the biggest challenges is the unclear responsibility and overlapping management across sectors. To tackle this, Zhou advocates for conducting a third national soil survey as soon as possible. Soil plays a crucial role in food safety, water security, energy security, biodiversity conservation, and climate change mitigation. Once contaminated, it threatens both the "vegetable basket" and the "rice bag." Currently, the land that has sustained us for generations is suffering from various forms of pollution. After years of accumulation, the health risks posed by soil pollution in China have become increasingly evident. Issues like cadmium rice and arsenic contamination have raised public concern. As some CPPCC members have pointed out, even with delays and concealment, soil pollution is no longer a distant issue. At this year’s National People's Congress, soil pollution prevention remains a hot topic. Many democratic parties have submitted proposals on soil pollution control and strengthening soil protection. For example, the Central Committee of the Zhigong Party, the Democratic National Construction Party, and the Agricultural Workers’ Party have each proposed measures to address heavy metal pollution, residual film pollution, and soil quality supervision. Zhou expressed concern about the lack of clarity regarding the extent of soil pollution in China. “We don’t know how much soil is polluted or the severity of the pollution,” he said. According to the 2014 "National Soil Pollution Status Survey Bulletin," the overall soil conditions were not optimistic, with a total超标 rate of 16.1%. However, Zhou clarified that this figure refers to the point超标 rate, not the area超标 rate. In December 2014, the Ministry of Agriculture released a report showing that only 27.3% of cultivated land was classified as high-quality, while 72.7% was medium or low quality. Soil pollution prevention involves multiple sectors, including land resources, agriculture, environmental protection, and industry. Overlapping responsibilities and unclear boundaries remain major challenges. Zhou had previously advocated for a nationwide soil survey ten years ago, but the project has yet to be launched due to its scale. He stressed that different departments use varying methods and standards, leading to inconsistent results. Most current data comes from the second soil census conducted in the early 1980s—data that is now outdated, given the significant changes in soil conditions over the past three decades. Beyond the national level, local efforts to prevent pollution and protect farmland are also key areas for CPPCC members' recommendations. Dong Yuanhua, a member of the Jiangsu Provincial CPPCC and researcher at the Institute of Soil Science, noted that the recent soil pollution survey provided limited information on the scope, location, type, and severity of pollution. He called for greater transparency in soil pollution data, similar to how PM2.5 levels are reported. Zhang Shufen, a member of the Henan Provincial CPPCC, highlighted that serious soil issues have already emerged in China’s core grain production areas. **Problem Manifestation** Areas such as metal mining zones, suburban garbage dumps, regions using organic fertilizers, sewage irrigation zones, and large wastewater treatment facilities are most prone to soil pollution. According to Zhou, current soil pollution in China is still localized, partly due to naturally high background values. Another critical issue is soil acidification, which increases the activity of heavy metals. Human activities, including industrial and mining operations, agricultural practices, and high natural background values, are the main causes of soil pollution, according to the first national soil pollution survey. Tang Hao, a member of the National CPPCC and vice-chairman of the Hubei Provincial Committee, has focused on rural issues. She recently visited Huazhong Agricultural University to study soil pollution and identified three main types of contaminated land: heavy metal, pesticide, and organic pollution, with heavy metal being the most severe. “People often say that food without pesticides is safe,” Tang said. “But if the soil is polluted, it's impossible to grow safe food without pesticides.” Zhou also pointed out a common misunderstanding that organic fertilizer is always healthy. In reality, it depends on the source. Some feed contains heavy metals, hormones, and antibiotics, making the use of organic fertilizer potentially more harmful than chemical fertilizers. **Advice** As the saying goes, "Without sufficient soil, it's hard to move forward." Similarly, restoring every inch of contaminated land requires time and effort. Once pollution occurs, it can be irreversible. Compared to urban and industrial land, farmland pollution is more complex, widespread, and difficult to manage. Some CPPCC members argue that while air pollution control has seen strong action, soil pollution also needs urgent attention. Failing to act could lead to severe health impacts and costly remediation efforts. Zhou pointed out that some soil pollution assessment indicators in China are not scientifically set. For instance, cadmium standards are higher than those in the UK, yet they may not reflect real risks. He suggested revising standards based on human health research and distinguishing between different soil types and pollution sources. Another challenge is the lack of comprehensive laws and regulations. Many committee members agree that clear legal frameworks are essential for effective soil pollution control. Proposals include enacting the Law on Soil Pollution Prevention and Control and ensuring that all actions are legally grounded. Unclear soil pollution data hinders effective prevention and control. With improved economic and technological conditions, Zhou recommends conducting the third soil census to map pollution accurately, establish a digital archive, and implement targeted strategies. Zhou also emphasized the need for rational land use, especially in a country with limited land resources. Different pollution levels should guide land use decisions. Public awareness and education are equally important. Enhancing societal understanding of soil conditions can foster proactive measures and reduce fear. Finally, soil pollution is hidden and delayed, making early prevention critical. Zhou stressed that prevention should be the top priority. Some members suggest adopting a "grading, classification, and zoning" approach to the soil environment, implementing a three-pronged strategy of "prevention, control, and treatment." Establishing a disciplinary system, incorporating soil pollution into local official assessments, and setting up a remediation fund to ensure timely repairs and hold polluters accountable are also recommended.

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