1. General information
Location and description of the intervention
City or FUA
Chiangmai
Region
Asia
Native title of the NBS intervention
มือเย็นเมืองเย็น
Short description of the intervention
Mue Yen Mueng Yen (Cool Hands Cool City) is the name of a green community as well as their first project that aims to plant more trees in Chiangmai city, Thailand. Volunteers of Mue Yen Mueng Yen are concerned about the pollution and extreme climate issues in the city. They gathered around the belief that healthy green space can help mitigate these issues and make their city more livable. (Ref. 1,2,3,4)
The first phase of the Mue Yen Mueng Yen project consists of three main activities. The first one is a tree-planting challenge: when 1 person plants a tree, they challenge 3 other friends to do the same. The second activity is offering 5,000 native saplings to anyone interested in planting trees for free. The third one is to plant 800 trees around the old moat in Chiangmai inner city as a green corridor. (Ref. 1,2,3,4)
Besides this initial project, the Mue Yen Mueng Yen community also works on various environmental projects. For example, spreading the tree-planting challenge to other parts of the country, and organising workshops about tree planting, maintenance techniques, native species and on rice growing (Ref. 6 ).
Address

Chiangmai
50200
Thailand

Total area
40220000.00m²
NBS area
40220000.00m²
Timeline of intervention
Start date of the intervention (planning process)
2015
Start date of intervention (implementation process)
2015
End date of the intervention
ongoing
Present stage of the intervention
Goals of the intervention
1. To improve the air quality of the city.
2. To mitigate the heat island effect in the city.
3. To create healthy green spaces through tree planting that support the urban ecosystem.
4. To encourage people to plant trees and to get involved.
5. To raise awareness about climate change-related issues and promote the importance of green spaces in urban areas in mitigating those. (Ref. 1,2,3,4,5,7)
Quantitative targets
1. Planting 5,000 trees in Chiangmai.
2. Planting 800 trees around the old moat in Chiangmai inner city area. (Ref. 1,2,3,4,5,7)
Monitoring indicators defined
1. Number of people involved in the tree-planting challenge.
2. Number of trees being planted.
3. Number of trees that survived after being planted.
4. Air pollution index and temperature in the city. (Ref. 3,5,6,7)
Climate change adaptation: What were the goals of the NBS?
Climate change adaptation: What activities are implemented to realize the conservation goals and targets?
Implementation activities
The first phase of Mue Yen Mueng Yen consists of 3 main activities:
1. Mue Yen Mueng Yen - Tree planting Challenge in Chiangmai
This activity started off in a small group by using social media to help encourage people to plant a tree on their own land as well as to take care of them. As one person plants a tree, they post a picture of their tree with the hashtag #มือเย็นเมืองเย็น, then challenge 3 other friends to plant a tree. The first group of people who started this challenge also set a condition that if at the end of the year, any of their trees die, the owner needs to jump into the old moat in Chiangmai city. This is to make sure that those new trees have been taken care of and will survive in a long run. (Ref. 1,3,4)
2. Mue Yen Mueng Yen - Free saplings
As the tree-planting challenge started to spread among the people, the Mue Yen Mueng Yen group wanted to scale up their tree-planting in more public areas as well. They worked with Huai Hong Khrai Royal Development Study Centre Chiangmai in preparing 5,000 saplings with over 83 native species. They distributed these tree saplings to anyone who was interested in planting for free. This activity aimed to expand the green areas and tree planting from private properties to public spaces. All 5,000 saplings had been planted in Chiangmai in less than a year.
In this phase, the Mue Yen Mueng Yen group became bigger with the involvement of experts in planting. The Mue Yen Mueng Yen group also offers workshops and advice on how to plant tree saplings and maintenance techniques.
(Ref. 2,3,4)
3. Mue Yen Mueng Yen - Koo Muang Yen
After offering free tree saplings, the Mue Yen Mueng Yen group collaborated with Chiangmai municipality in establishing a tree-planting activity around the old moat of Chiangmai city. In total, 800 trees of native species had been planted around the old moat. They also invited all Chiangmai citizens to participate in planting these trees together. The municipality took care of the trees after this activity. At the same time, people who planted the trees were encouraged to come back to check on them and take care of the trees if needed. (Ref. 2,3,5)

The First phase of Mue Yen Mueng Yen was completed with 3 activities above. However, since then the Mue Yen Mueng Yen community has been working on other environmental projects, as well. For example, providing maintenance for trees that were planted during the first phase, planting new street trees in the city, work on canal ecology restoration, and offering rice growing and other environmental workshops. (Re. 2, 3, 5)
NBS domain and interventions
Ecological domain(s) where the NBS intervention(s) is/are implemented
Grey infrastructure featuring greens
Alley or street trees and other street vegetation
House gardens
Institutional green space
Parks and urban forests
Green corridors and green belts
Vegetation Type
Please specify how many trees were planted
Over 5,800 tress of 83 native species were planted. Example of native species includes Homonoia riparia, Millettia brandisiana, Terminalia bellirica, Dipterocarpus alatus, Mitragyna diversifolia. (Ref. 1,2,7)
Amenities offered by the NBS
Services
Expected ecosystem services delivered
Regulating services
Local climate regulation (temperature reduction)
Air quality regulation
Habitat and supporting services
Habitats for species
Cultural services
Aesthetic appreciation
Recreation
Intellectual interactions (scientific and / or educational)
Social and community interactions
Scale
Spatial scale
Meso-scale: Regional, metropolitan and urban level
Beneficiaries
Primary Beneficiaries
Governance
Governance arrangements
Non-government actors
Citizens or community groups
Please specify the roles of the specific government and non-government actor groups involved in the initiative
Mue Yen Mueng Yen is a green community initiated by Pharadon Por Phonamnuai. As of 2023, the community comprises volunteers from various professions, who are mostly local citizens of Chinagmai.
Chiangmai Municipality supports the Mue Yen Mueng Yen community in various activities to improve Chiangmai’s environment.
The community also collaborated with Mae Jo University to ensure the health and maintenance of 400-500 trees, including already planted trees along the Chiangmai and Lamphun Roads with hundred-year-old Yang Na trees.
Several authorities and institutions support Mue Yen Mueng Yen by offering free tree saplings and seeds. For example, the Huai Hong Khrai Royal Development Study Centre Chiangmai, the Mar On Tree Saplings centre (under Forestry Department), the Mae Hit Botanical Garden, the Huai Kaeo Arboretum, the Don Suthep National Park, and the Pakhunmaekuang Royal Development Project. Some tree-planting volunteers (residents, companies, hotels etc.) with private landowners also got involved with the project. (Ref. 2,3,4,5,7)
Key actors - initiating organization
Key actors - Other stakeholders involved (besides initiating actors)
Local government/municipality
Public sector institution
Non-government organisation/civil society
Citizens or community group
Researchers/university
Private sector/corporate actor/company
Participatory methods/forms of community involvement used
Policy drivers
NBS intervention implemented in response to an Regional Directive/Strategy
No
NBS intervention implemented in response to a national regulations/strategy/plan
No
NBS intervention implemented in response to a local regulation/strategy/plan
No
Mandatory or voluntary intervention
Voluntary (spontaneous)
Enablers
Presence of specific city-level GI/NBS vision/strategy/plan - mentioned in connection to the project
No
Presence of specific city-level GI/NBS section/part in a more general plan - mentioned in connection to the project
No
Presence of city network or regional partnerships focused on NBS - mentioned in connection to the project
No
Presence of GI / NBS research project - mentioned in connection to the project
No
Subsidies/investment for GI / NBS in the city - mentioned in connection to the project
Unknown
Co-finance for NBS
Unknown
Co-financing governance arrangements
Unknown
Was this co-governance arrangement already in place, or was it set up specifically for this NBS?
Financing
Total cost
What is/was the Cost/Budget (EUR) of the NBS or green infrastructure elements?
Unknown
What are the total amount of expected annual maintenance costs?
Unknown
What is the expected annual maintenance costs of the NBS or GI elements?
Unknown
Please specify cost savings
Unknown
Please specify total cost (EUR)
Unknown
Source(s) of funding
Type of fund(s) used
Non-financial contribution
Yes
Type of non-financial contribution
Which of the involved actors was motivated by this model?
Type of innovation
Please specify social innovation
The project grew out of the individual aspiration of a Thai musician, who wanted to contribute to the urban greenery of Chiangmai through a tree planting challenge. With time, not only individual citizens but actors from the public and private sector joined in the programme, challenging each other - and thus involving each other - in the project. The tending and maintenance of the planted trees are also a joint venture: while most of the trees are the responsibility of the municipality, the Mue Yen Mueng Yen community collaborated with the Mae Jo University to take care of 400-500 trees while individuals planting trees take also responsibility for their own plants. This combination of initiation and tree maintenance makes this a unique ground-up project. Also, social media, as the main communication platform to spread the word and involve more and more participants plays a great role in the success of the project. (Ref. 2)
Novelty level of the innovation
Please specify novelty level of the innovation
There are several tree planting challenges world wide, however, this challenge follows the popular idea on social media platforms called the 'ice bucket challenge' to involve more people in the programme. Thus, not the idea, nor the system is a novelty, however, the combination of these makes this project unique. (Ref. 1, 2)
Replicability/Transferability
Please specify Replicability/Transferability
While there were plans and commitments stating that if 5000 trees were planted in Chiang Mai - which was achieved - expanding to other provinces is on the horizon, no information was found whether this was realised or not. (Ref. 2)
Impacts, benefits
Description of environmental benefits
- The increased green cover in the inner part of Chiangmai is expected to lower local temperature, that has been increasing and developing the heat island effect in some parts of the city (Ref. 2,5)
- The planted trees are expected to contribute to improving the air quality in the city of Chiangmai. (Ref. 1,2,5)
- With the tree plantation challenge, green area creation was promoted over grey coverage in public spaces and in the private areas (Ref. 5).
- With targeted tree planting along the old moat surrounding the inner city of Chiangmai, where 800 trees were planted, the city got a green corridor (Ref. 1)
- Over 5,800 trees of 83 native species were planted, increasing the number of fauna species present. Example of native species includes Homonoia riparia, Millettia brandisiana, Terminalia bellirica, Dipterocarpus alatus, Mitragyna diversifolia. In order to support the growing and survival of the planted trees, Chiangmai has professionals taking care of the plants (Ref. 1,2,7)
Economic impacts
Description of economic benefits
Unknown
Description of social and cultural benefits
- Through the tree planting challenge, people connected with each other in the public and private sectors alike, on individual and institutional levels as well, in the name of urban green space creation. The Mue Yen Mueng Yen group became bigger with the involvement of experts in planting and many volunteers (Ref. 1,2)
- The joint tree planting along the old moat gave an opportunity to bring together people and enhance social connections among them. (Ref. 2)
- While the municipality is responsible for the maintenance of the trees planted along the old moat, the tree planting challenge invited people to not only plant the trees but also tend to them - if trees didn't survive, their owner had to jump into the old moat. (Ref. 1,2)
- This aspect of the project also kept people engaged with nature, as it enhanced environmental stewardship (Ref. 2,6)
- The project itself raised awareness about environmental issues Chiangmai faces while the workshop directly offered by the Mue Yen Mueng Yen group on tree planting and saplings maintenance techniques foster the environmental learning of participants and support their long-term care for nature (Ref. 2,3,4)
Type of reported impacts
Indicators
- Number of trees planted
- Number of different species of trees planted
- Number of citizens who volunteer to tree planting (Ref. 6)
Analysis of specific impact categories
Job creation: The NBS created ...
Environmental justice: The implementation of the NBS project resulted in ...
Negative impacts: Did the project cause any problems or concerns?
No information was found regarding negative impacts of the project
COVID-19 pandemic
Unknown
Methods of impact monitoring
Evidence for use of assessment
Presence of an assessment, evaluation and/or monitoring process
Yes
Presence of indicators used in reporting
Yes
Presence of monitoring/evaluation reports
No evidence in public records
Availability of a web-based monitoring tool
No evidence in public records
Impact assessment mechanism
Name of any specific impact assessment tools
Unknown
Use of GIS in mapping impacts
No evidence in public records
Citizen involvement
Citizens involvement in assessment/evaluation
Unknown
Citizens involvement in the analysis of the assessment/evaluation
Unknown
Follow-up to the evaluation / assessment
Unknown
References
List of references
1. A Day (2019), ปอ ภราดล และ ‘มือเย็นเมืองเย็น’ โปรเจกต์ปลูกต้นไม้ที่อยากเห็นเชียงใหม่เย็นขึ้นเร็วๆ, Available at https://adaymagazine.com/mueyen-por-paradon/ (Accessed 31-01-2023)
2. Bangkok Business (2015), เมืองเย็น ด้วยมือเรา, Available at https://www.bangkokbiznews.com/lifestyle/658547 (Accessed 31-01-2023)
3. FURD (2016), กลุ่มมือเย็นเมืองเย็น : การขับเคลื่อนสู่เมืองสีเขียว, Available at https://www.slideshare.net/FURD_RSU/ss-58999230 (Accessed 31-01-2023)
4. Creative Move (2015), มือเย็นเมืองเย็น ท้าปล๔กตเนไม้เพิ่มพื้นที่สีเขียว ถ้าคุณแน่ เราขอท้า, Available at https://www.creativemove.com/creative/meuyen/ (Accessed 31-01-2023)
5. Inspiring Thailand (2015), #มือเย็นเมืองเย็น – ชวนคนมือเย็น ร่วมสร้างเมืองเย็น, Available at https://inspiring.org/มือเย็นเมืองเย็น-ชวนคน/ (Accessed 31-01-2023)
6. มือเย็นเมืองเย็น (no date), มือเย็นเมืองเย็น Fan Page, Available at https://www.facebook.com/media/set/?set=a.576153542538335&type=3 (Accessed 31-01-2023)
7. Review Chiangmai (2015), เมื่อชายคนหนึ่งฝันถึงต้นไม้ #มือเย็นเมืองเย็น, Available at https://reviewchiangmai.com/3196-p/ (Accessed 31-01-2023)
Comments and notes
Comments
Mue Yen Mueng Yen is the name of the community and their first project which can cause some misunderstanding. The Mue Yen Mueng Yen community initiated various projects but I choose to focus only the most recognisable one which is the first phase that focuses on planting trees in urban area. Also, other projects does not have solid qualitative result as mush as the first phase.

Additional insights
Environmental impact/benefits (Ref. 1,2,3)
- increase number of trees in urban area
- increase and improve the quality of green space in urban area
- lower the temperature in urban area and improve air quality (expected result from this project)

Social impact/benefits (Ref.1,3,5)
- encourage social interactions
- raised awareness about environmental issues
- invite people with the same mindset/interests to meet and continue working together to solve environmental issues.

Economic impact/benefits - not mentioned

Governance (Ref. 2,3,5,7)
This project is totally initiated by local people in Chiangmai. As more people interested, this link to the collaboration with other public institutes and local government to expand the target and make sure that it is legal to do so (to plant more tress, especially in public space).

Monitoring (Ref. 6)
Mue Yen Muent Yen community has a project to collect data about the number of tree, species of tree being planted and tree location. with this data, they will build an online map, which also act as a database, of trees that has been planted through their projects.
They have a project that follow-up the condition of trees that they planted along the old moat. They re-planted those that die and create support structures for some trees that needed.
Public Images
Image
Mue Yen Mueng Yen - Tree Saplings
Mue Yen Mueng Yen - Tree Saplings
Source: Ref. 7
Image
Mue Yen Muent Yen Plan
Mue Yen Muent Yen - Expected Plan
Source: Ref. 6
Image
Mue Yen Mueng Yen - Planting trees along old moat
Mue Yen Mueng Yen - Planting trees along old moat
Source: Ref. 8