Kyiv is the largest city of Ukraine, with approximately 2.95 million inhabitants as of January 1, 2022. Kharkiv had the second-largest population of around 1.42 million, followed by Odesa and Dnipro. Economic situation in Ukraine Ukraine has a population of around 42 million inhabitants - close to 70 percent of which live in urban areas, with almost three million living in Ukraine’s largest city and capital, Kyiv. The city is located in the north central part of the country on the Dnieper River and is one of the largest in Europe. The country’s second-largest city, Kharkiv, is about half of Kyiv's size and located in the northeast. Kharkiv was the first city to be occupied by the Soviet Union in 1917 until the collapse of the Soviet Union in 1991. Since the collapse, Ukraine has been largely divided between east and west. Many inhabitants speak Ukrainian to the west, whereas Russian is dominant in parts of the east and south. Like Kharkiv, many of Ukraine’s other biggest cities which have fewer than one million inhabitants are located to the east of the country – a region which has uprooted and displaced many of its inhabitants because of the military actions that started in 2014. In 2015, Ukrainians across the country were affected by a huge spike in inflation, which reached near 49 percent. In the following years, it marked a decrease, measuring below three percent in 2020. The country’s GDP has also been significantly impacted by the crisis, which has left approximately 1.5 million Ukrainians internally displaced since 2014, according to the United Nations High Commissioner for Refugees (UNHCR). The unemployment rate was above nine percent in 2020.

The contemporary globalized world characterizes the rapid population growth, its significant concentration in cities, and an increase in the urban population. Currently, many socio-cultural, economic, environmental, and other challenges are arising in modern cities, negatively affecting the state of the urban environment, health, and quality of life. There is a need to study these problems in order to solve them. Urban Green Areas (UGAs) are a part of the social space and a vital part of the urban landscape. They act as an environmental framework of the territory and a factor ensuring a more comfortable environment of human life. This study aims at substantiating the importance of the UGAs, identifying the spatiotemporal dynamics of their functioning, and transforming changes in their infrastructure given the expansion of their functions. This research was carried out as a case study of the second city in Ukraine, Kharkiv. The authors developed and used an original integrated approach using urban remote sensing (URS) and GIS for changes detection to evaluate the current state and monitor spatial transformations of the UGAs. We used several GIS platforms and online resources to overcome the lack of digital cadastre of the thematic municipal area of Kharkiv. This resulted in the present original study. The study analyses the dynamics of the spatial and functional organization of the UGAs according to the Master Plans, plans, maps, and functional zoning of the city for the period from 1867 to 2019. The peripheral green areas became important after the large-scale development of the extensive residential areas during the rapid industrial development in remote districts of the city. They provide opportunities for population recreation near living places. Central UGAs are modern, comprehensively developed clusters with multidisciplinary infrastructure, while the peripheral UGAs are currently being developed. The use of URS/GIS tools in the analysis of the satellite images covering 2000–2020 allowed identifying the factors of the UGAs losses in Kharkiv and finding that UGAs were not expanding and partially shrinking during the study period. It is caused by the intensive construction of the residential neighborhoods, primarily peripheral areas, infrastructure development, and expansion of the city transport network. Nonetheless, some sustainable trends of UGA functioning without more or less significant decrease could be proved as existing in a long-term perspective. The authors analyzed and evaluated changes and expansion of the UGAs functions according to modern social demand. The research value of this is the usage of different approaches, scientific sources, URS/GIS tools to determine the UGAs transformation in the second-largest city in Ukraine (Kharkiv), to expand and update the main functions of UGAs and their role in the population’s recreation. The obtained scientific results can be used to update the following strategies, programs, and development plans of Kharkiv.

As of September 2020, the capital of Ukraine Kyiv, offered by far the most public transport routes - a total of *** bus routes and ***** metro lines were available for its locals. The second biggest locality in the country, Kharkiv had the same number of metro routes as the capital. The number of bus routes, however, was twice smaller than in Kyiv.

Russia is the largest country in Europe, and also the largest in the world, its total size amounting to 17 million square kilometers (km2). It should be noted, however, that over three quarters of Russia is located in Asia, and the Ural mountains are often viewed as the meeting point of the two continents in Russia; nonetheless, European Russia is still significantly larger than any other European country. Ukraine, the second largest country on the continent, is only 603,000 km2, making it about 28 times smaller than its eastern neighbor, or seven times smaller than the European part of Russia. France is the third largest country in Europe, but the largest in the European Union. The Vatican City, often referred to as the Holy Sea, is both the smallest country in Europe and in the world, at just one km2. Population Russia is also the most populous country in Europe. It has around 144 million inhabitants across the country; in this case, around three quarters of the population live in the European part, which still gives it the largest population in Europe. Despite having the largest population, Russia is a very sparsely populated country due to its size and the harsh winters. Germany is the second most populous country in Europe, with 83 million inhabitants, while the Vatican has the smallest population. Worldwide, India and China are the most populous countries, with approximately 1.4 billion inhabitants each. Cities Moscow in Russia is ranked as the most populous city in Europe with around 13 million inhabitants, although figures vary, due to differences in the methodologies used by countries and sources. Some statistics include Istanbul in Turkey* as the largest city in Europe with its 15 million inhabitants, bit it has been excluded here as most of the country and parts of the city is located in Asia. Worldwide, Tokyo is the most populous city, with Jakarta the second largest and Delhi the third.

Ukraine's nickname, the breakbasket of Europe, is based on fact that it has produced and exported an abundant wheat crop to other countries and not just Europe. Lets investigate why the Ukaine is an important agriculture supplier and how the war will directly affect agriculture production as well as how it will affect global food supplies. Ukraine is the second largest country in Europe with a total area of approximately 233,100 square miles. The map shows the Crimia region as part of Ukraine, but it has been under the control of Russian since 2014. The estimated population was 47.2 million in 1917 with the largest city being Kyvi.

In 2025, according to data provided by StartupBlink the top city for startups in Central and Eastern Europe was Moscow (Russia) with a total score of *****, followed by Tallinn (Estonia).