Recently Pledged:

Linz
Participant City

Linz

The city of Linz is located in the center of Upper-Austria and accounts for about 200,000 inhabitants. This city is facing multiple climate-related challenges including the urban heat island effect. In 2019, Linz adopted its first ”Climate Strategy“ covering six thematic areas including organization, research and information, urban design, building and green space, energy, nature and food, mobility and traffic. One of the most important actions the city follows to reduce the urban heat island effect is called the "tree planting offensive". This offensive includes planting 1,000 large-crowned trees on eleven streets. To reduce heat stress for citizens and optimize the urban ventilation, another 30 trees have been planted at Linzer main square. By planting trees, the city seeks to enhance the natural environment and air quality, improve its resilience to climate change impacts and contribute to a healthier, more livable urban environment. 

Mannheim
Participant City

Mannheim

With 309,721 inhabitants, Mannheim is the second largest city in the Baden-Württemberg region of Germany. Over 1,800 hectares of forest surround the city and with the mission statement "Mannheim 2030", the city is implementing the 17 SDGs of the United Nations at the local level. In particular, the city is focusing on SDG 15, "Manage forests sustainably" and "Halt biodiversity loss". As a Local Green Deal pilot city, Mannheim also supports the EU-Green Deal field of action, "Preserving ecosystems and biodiversity" with concrete agreements. The city's vision for their forest is to develop a healthy, ecologically valuable and climate-stable mixed forest. Mannheim's forest invites recreation, provides habitat for species and contributes to the city's CO2 neutrality through sustainable wood use. Pine forests in Mannheim, that are not adapted to the climate, are being converted into near-natural, multi-level mixed deciduous forests. The focus of all forestry activities is the long-term and permanent preservation of the recreational forest, taking into account the protection of species. Areas are planted where pines are dying and where there are not enough climate-stable tree species to expect natural regeneration of suitable tree species.

Participant City

Barcelona

With a population of over 1.6 million, Barcelona is the second-largest city in Spain and is located on the Mediterranean coast. The local authorities understand the planting of trees to be a simple but powerful way to create more sustainable and resilient cities. This is reflected in the “Nature Plan 2020-2030”, aimed at increasing the city’s canopy cover by 100 hectares and the “Master Plan for Barcelona’s Trees 2017-2030”. The city wants to be even greener and thus introduced a 10-year plan – the superblock model “Superilla Barcelona” – that will turn 1-in-3 streets in the commercial and residential area into green zones. The city’s recent participation in the “Trees in Cities Challenge” aligns well with such existing efforts. Barcelona pledged to plant almost 8,000 new trees throughout 2021 and 2022. The city aims to maximize the benefits of urban trees and forests, integrate the new trees in the urban environment as well as use a diverse species selection adapted to the changing climate. At the core of the tree planting activities is the sustainable management of urban and peri-urban trees and forests as well as the coexistence between citizens and nature to create a long-lasting impact.

Participant City

Moscow

Moscow, with a population of over 12 million, is the capital of Russia and one of the world’s megacities. Moscow has developed three main strategies; “The Master Plan 2010-2035” aimed at balancing urban development; the “Investment Strategy 2035” seeking to create favorable investment conditions that improve urban development; and the “Smart City 2030” fostering a digital economy. Moscow scores highly for the total area of green and recreational facilities per capita and also for their accessibility. In 2013 Moscow launched the “Million Trees” initiative, which saw more than 4 million trees planted together with citizens so far. To signal its willingness to continue such efforts, the city participates in the “Trees in Cities Challenge”, pledging to plant almost 83,000 trees in its urban area, including parks and courtyards. Moscow thereby seeks to engage citizens in the selection of tree species and encourage courtyard gardening, to organize educational events dedicated to the importance of trees and forests in the urban context as well to monitor green spaces and perform disease and pest prevention measures.

Participant City

Mexico City

With almost 22 million inhabitants, Mexico City is the country’s most populous city. One of its most significant urban challenges is the city’s poor air quality, which the city government aims to tackle through the “Plan Verde” (Green Plan). By participating in the “Trees in Cities Challenge”, Mexico City aims to preserve and enhance biodiversity, strengthen the environmental awareness of its residents and enhance ecosystem services in its urban area. By mid-2021, the city implemented 98% of its pledge to plant 8 million new trees and shrubs, along with other activities, including the creation of 450 pollinator gardens and boosting the plant production of native species in its nurseries.

Participant City

Chinasau

Chisinau is located in the south-central part of Moldova. With 700,000 residents, the capital is also the country's largest city. Chisinau faces multiple climate-related challenges, which it aims to tackle by implementing nature-based solutions. With the “Trees in Cities Challenge”, Chisinau aims to reduce urban pollution and temperature; increase green cover for the benefit of the entire urban population; engage residents and increase their environmental awareness. Chisinau pledged to plant 100,000 trees and has planted half of them so far. In 2020, the city has planted 60 different tree species along streets and in parks during a National Day dedicated to trees and has distributed free planting material to all interested citizens as well as educational and health institutions.