Plastic trash can The colors of are usually green, blue, and gray. These colors are not randomly selected, and each color has a specific purpose and meaning.

1. Green trash can is usually used to hold domestic garbage, such as food residues, waste paper, etc. This is because green is regarded as a "green" color, which has the meaning of environmental protection, cleanness and nature. Domestic garbage is generated almost every day, which needs to be cleaned and treated to maintain environmental health and ecological balance. Therefore, the green trash can has become the most common trash can.

2. The blue trash can is usually used to contain recyclable garbage, such as bottles, cans, plastic containers, etc. Blue represents clear sky and transparent sea water, which is clean and environmentally friendly. Recyclable garbage can be used to make new goods, so it can not only reduce the amount of garbage, but also reduce the impact on the environment. Unlike domestic waste, recyclable waste needs to be sorted and treated in order to make better use of it.

3. Grey trash cans are usually used to contain hazardous wastes, such as batteries, bulbs, chemicals, etc. These wastes usually cannot be recycled, so special treatment methods are required. Hazardous waste contains toxic and harmful substances. If not handled correctly, it will cause great harm to the environment and human health. Therefore, the color of the gray trash can usually reminds people that this kind of garbage needs special treatment and cannot be discarded or mixed in other garbage at will.

The color of plastic trash can is not randomly selected, but meaningful. They can help people better identify and classify garbage, and promote the protection and sustainable development of the ecological environment. At the same time, the garbage cans of different colors also remind people how to properly dispose of different kinds of garbage to make the environment more beautiful and healthy.