Despite not having caused the current human-caused climate crisis, children, youth, and future generations are among the most severely impacted groups who are paying and will pay the consequences of growing up in overcrowded, unsafe, and polluted environments. We can no longer afford to think in terms of ‘business as usual’: centuries of exploitative and oppressive practices in the name of progress have hampered the quality of life of present and future beings, as well as their very existence. Therefore, it’s crucial to listen to young people and that they are equipped to do so. However, this advocacy guideline is not just aimed at young people but all those that want to learn how to advocate on EU level for cleaner cities.