Climate change is controversial and progressing steadily. The emission of additional pollutants within cities further worsens the situation. Likewise, the constant warming caused by cities is increasing. All in all, the quality of people's lives is reduced. Green cities should contribute to a more natural feeling and better living conditions. Urban greening, multifunctional use of parks, sustainable transport possibilities and water recycling are the instruments for a flourishing future. Turning a city into a green city is a start in the fight against the consequences of climate change.