The raw material of plastic bag is polyethylene. Plastic bags do bring convenience to people's life, but this temporary convenience brings long-term harm.
What are the hazards of plastic bags to the environment?
1. Toxicity of plastic bags
The commonly used food plastic bags are mostly made of polyethylene film, which is non-toxic, so it can be used to hold food. Another kind of film is made of PVC, which is non-toxic. However, according to the use of the film, additives are often harmful to human body and have certain toxicity. Therefore, this kind of film and the plastic bag made of the film are not suitable for food. If you want to identify PVC plastic bags and polyethylene plastic bags, the following simple method can be used for identification.
1. Polyethylene film (non toxic)
The film is milky white and translucent (especially obvious when several layers are stacked). It feels more lubricating. It seems that there is a wax layer on the surface. It shakes hard and the sound is brittle. It is flammable in case of fire. The flame is yellow. There is mucus dripping during burning and the smell of candle burning.
2. PVC film (generally toxic)
If the pigment is not added, it is transparent. The surface is sticky to the touch, shaking with force, and the sound is low. It is not easy to burn in case of fire. It will extinguish immediately after leaving the flame, and the flame is green.
2. Harm of plastic bags
The recycling value of plastic bags is relatively low. In the process of use, in addition to scattered in urban streets, tourist areas, water, roads and railways, it also has potential hazards. Plastic structure is stable, not easy to be degraded by natural microorganisms, not separated in the natural environment for a long time. This means that if the waste plastic waste is not recycled, it will become a pollutant in the environment for a long time, and it will cause great harm to the environment.
1. Affect agricultural development
The continuous accumulation of waste plastic products in the soil will affect the absorption of nutrients and water by crops, resulting in crop yield reduction.
2. It is a threat to the survival of animals
Waste plastic products discarded on land or in water are swallowed by animals as food, resulting in animal death. Last year, there were 20 herdsmen by the Qinghai Lake, with a total of nearly 1000 sheep killed, resulting in an economic loss of more than 300000 yuan. Sheep like to eat oily residues wrapped in plastic bags, but they often eat them with plastic bags. Because the plastic they eat remains in their stomach for a long time and is difficult to digest, their stomachs are full and they can't eat any more. Finally, they have to starve to death. Such things are common in zoos, pastoral areas, rural areas and the sea.
3. Waste plastics are difficult to be treated with garbage
Waste plastics will not only occupy a large amount of land, but also can not be restored for a long time, which affects the sustainable use of land. It will take 200 years for the waste plastic products to be degraded if they are landfilled.
Moreover, plastic bags are made of petroleum, which not only consumes a lot of resources, but also can not be decomposed. If buried underground, it will pollute the land and rivers.
4. Plastic bags release harmful gases
In addition, the plastic bag itself will release harmful gases. Especially cooked food, packaged in plastic bags, often deteriorates. The influence of deteriorated food on children's healthy development is particularly prominent.
Plastic bags consume a lot of energy. It is estimated that every one ton of plastic bags in China will consume 3 tons of oil, and the amount of plastic bags used in China can last at least 3 million ordinary cars for five years. Change this situation, eliminate the trend of ultra-thin plastic bags, benefit the country and the people, for generations to come!
