Environmental Knowledge Quiz

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1. What is green food? The scope of green food covers various food categories such as eggs, milk, fish, vegetables, fruits, grains, alcohol, beverages, and seasonings. In the future, pollution-free and safe green foods will surely make their way into thousands of households, and the production and distribution channels for such foods will also become increasingly sophisticated. 2. What is pollution? 　　Pollution is short for environmental pollution, referring to the deterioration of environmental quality caused by the introduction of certain substances or energies. Legally, environmental pollution refers to the phenomenon in which the environmental quality of a specific area deteriorates below the environmental quality standards applicable to that area due to the presence of certain substances or energies. Substances that can cause environmental pollution are known as pollutants, such as SO2 and other harmful gases emitted during production processes, as well as various heavy metals. The phenomenon of environmental quality deterioration caused by energy intervention is commonly referred to as pollution, such as thermal pollution. Environmental pollution can be caused by human activities (such as pollutants emitted from human production and daily life activities that contaminate the environment), as well as by natural factors (such as dust and harmful gases released by volcanic eruptions that pollute the environment). The environmental pollution that environmental protection efforts aim to prevent is mainly caused by human activities. Environmental pollution can be classified into biological pollution, chemical pollution, and physical pollution based on the nature of the pollutants ； Classified by the polluted environmental elements, it can be divided into air pollution, water pollution, soil pollution, marine pollution, etc ； Based on the sources of pollution, it can be classified into industrial pollution, agricultural pollution, transportation pollution, domestic pollution, etc. Preventing and controlling environmental pollution is the foundation of environmental management and environmental science research; it is also an important aspect of environmental protection, and furthermore one of the most crucial tasks in China’s environmental protection efforts. 3. What is noise? Noise, by physical definition, refers to oscillations that are completely irregular in amplitude and frequency. From an environmental protection perspective, any sound that is not desired by people is referred to as noise. The notable characteristics of noise are: the absence of pollutants, no energy accumulation, a limited duration, short propagation range, disappearance of noise when the vibration source stops vibrating, and the inability to address it through centralized control. Noise comes from vehicles, factory machinery, construction work, and people’s social and household activities. The harms of noise to humans are multifaceted, mainly manifesting as hearing damage, disturbance of sleep, and physiological and psychological effects on the body. When people work in a noise environment of around 100 decibels, they experience discomfort and pain, and it can even cause temporary deafness. Noise above 140 decibels can cause vibrations in the eyeballs and blurred vision; it can also lead to fluctuations in breathing, pulse, and blood pressure, and may even cause blood vessels throughout the body to constrict, reducing blood supply and affecting speech ability.