City Soldier is to use the inner planting boards to plant Soapwort (Saponaria officinalis) stations, which can provide urban greenery, slow down the heat island effect, filter traffic pollutants, and use the processing machine below the stations to make the saponins into natural detergent is for city dwellers.

| Design background

With the rapid development of cities, there are many high-rise buildings, the natural environment between cities is becoming rarer and rarer, and complex transportation methods have also caused serious air pollution; detergents are used in large quantities, and chemical cleaning liquids remain in bottles and cans, which cannot be effectively recycled and will lead to water sources. Pollution poses a major threat to the environment.

| Existing problem

1. Air pollution is the nearest invisible killer to you and me.

Road pollution caused by means of transportation not only accounts for a high proportion but also is the most frequently contacted hot spot of pollution. People may not live near industrial areas or construction projects, but as long as they live on both sides of the road or go out on the road, they will be exposed to the polluted air. Therefore, the impact of traffic air pollution on you and me is more harmful than other pollution sources!

2. Lack of urban green, leading to the heat island effect.

With the rapid economic development, there are many high-rise buildings and wealth has increased, but the appearance is dirty, messy, ugly, and crowded, giving people a sense of suffocation. Cities use a lot of electricity, petrochemical, and artificial heat sources, and urban green space is increasingly scarce. The temperature in urban areas is often higher than that in the periphery by more than 5 degrees Celsius. Urban construction experts are thinking about how to find the livability of the city with green methods.

3. Detergents you don't know.

There are hundreds of detergents in the world, ranging from washing face and bath to washing clothes, and dishes and mopping the floor. All kinds of products emphasize "super cleaning power and whiteness as new after washing", and constantly bring forth new products. A variety of detergents, various ingredients, and some chemical compounds may cause allergy, carcinogenesis, and environmental hormones to cause body lesions, but the petrochemical ingredients contained in them cannot be decomposed. As sewage is discharged into streams and rivers, it also has a huge impact on the environment.

| Data survey

WHO classifies PM10 and PM2.5 as primary carcinogens. According to the survey conducted by the Air Quality Monitoring Department of the Environmental Protection Agency, the proportion of vehicles in domestic pollution is as high as 30-37%. The research of the Public Health Institute of Taiwan University also shows that PM2.5 ranks fourth among the important risk factors of the death burden of Chinese people. Every year, about 8600 people are killed or die early due to air pollution exposure.

Regarding the impact of traffic pollutants on human health in 2019, a study by the British Medical Journal showed that those who live within 50 meters of the main road have a 63% higher chance of developing coronary arteriosclerosis than those who live 200 meters away. The main reason is that the fine suspended particles emitted by automobiles and motorcycles will affect the heart and lung function of the human body and increase the risk of cancer. Professor Long Shijun of the Chinese Academy of Sciences also pointed out that the vast majority of the population in Taiwan lives within 200 meters of the road.

| Concept

City soldier is a public station capable of purifying, planting, and making natural detergent. The planting panels on the inner facade are used to increase the planting area of saponin-rich lime flowers (Soapwort). In addition to providing urban greenery and slowing down the heat island effect, With the help of the processing machine under the station, it is also possible to make a natural cleaning solution from the soapwort for public use and improve the damage to people and the environment caused by chemical detergent and plastic containers. The transparent solar panel on the top allows light to penetrate the planting area and absorbs sunlight to convert electricity to provide lighting for planting at night and make natural cleaning fluid. City soldiers are installed next to roads, which can increase the urban planting area and filter traffic pollutants, improve air quality, and reduce pedestrian respiratory diseases.

| Using plants

Saponaria officinalis, also known as soap grass, contains saponin, can foam, and also has a cleaning effect. The whole plant is about 7 cm high, has long sunshine hours, is drought-tolerant, and is easy to grow. Nowadays, it is mostly used as a landscape plant. And the vitality is also very tenacious, the growth is fast, and it can provide three production processes in about one month.

| Air filtering method

City Soldier is installed on the side of the road or the sidewalk and can filter the exhaust gas generated by the driving of vehicles. As waste passes through the ceramic filter layer, clean air is exhausted to the sidewalk, helping to reduce pedestrian inhalation of excess particulate matter.

| Technology

-Transparent solar cells

Transparent solar panels, with high light transmittance, can introduce 70% of visible light and capture ultraviolet (UV) and near-infrared (NIR) light, and convert them into electricity for City Soldier to use. At the same time, the incoming light can also be used as a light source in the planting area to provide the needs for plant growth.

-Light emitting diode; LED

City Soldier uses LED for decoration and lighting. The LED has a long service life and can be used for 25,000 to 50,000 hours, and the LED luminous uniformity, brightness, and color consistency are high. It is strong and reliable without the problem of filament breakage, which makes the design freedom high. It can be used as a street on the outside of City Soldier. Reminding street lights, let City Soldier stand at night and light up the night for citizens to become the guardian of the community.

| Material

-The use of glass materials facilitates subsequent recycling and decomposition.

Since the most basic raw materials of glass materials are taken from the earth itself (sand, soda ash, and limestone) it is 100% recyclable and does not reduce the quality or purity of the glass. The glass recycling rate in Taiwan ranks second in the world, with a recycling rate as high as 92%. Therefore, even if the City Soldier station shell is damaged, it can be reused in other products.

-Ceramic washable instead of disposable materials.

City Soldier uses a ceramic filter layer that can be replaced after a period of use. Through professional cleaning, it can be used again. To improve the existing filtering device, frequent filter replacement is required, causing environmental problems.

-Color steel coating.

City Soldier uses color steel paint, which is economical and can be widely used and widely used in cities. Color steel coating also has excellent weather resistance, which is suitable for outdoor architectural coatings, making City Soldier not easy to damage. The rich colors of paint are used to provide City Soldier with different colors and feelings.

| Using place

1. Sidewalk

City Soldier is located on both sides of the road or on the sidewalk, which can relieve fatigue when commuting to and from get off work and can breathe cleaner air during walking.

2. Public toilet

City Soldier can be used in public toilets to create atmosphere, filter air, and decorate with green leaves, and use City Soldier to make ECO friendly Detergent, which can solve the problem of using large amounts of cleaning agents in public toilets, and can also become a highlight in space.

| Expectation effect

1. Reduce traffic air pollution

City Soldier can alleviate the large number of suspended particles generated during commuting, improve visibility, make driving safer, and improve the surrounding residents' air quality to alleviate respiratory diseases.

2. Reduce carbon footprint every year

It takes an average of 1.2kg of carbon footprint to make a can of cleaner, while small families with 3-4 people need to use 13 different cans of cleaner every year. City Soldier manufactures about 3.6 kg of cleaning liquid during manufacturing, which can reduce the carbon footprint by about 12-13 kg per year.

3. Use of natural surfactants

Reducing water source and environmental pollution can also reduce human hazards.

| Market size

The global cleaning liquid is expected to reach 40.482 billion US dollars in 2025, and the compound growth rate from 2018 to 2025 is about 5.2%.

Public awareness of environmental protection has improved. Among the 1086 valid questionnaires, 80.6% of the public expressed their willingness to spend to buy environmentally friendly products.