Why did Ban Ki-moon say climate change does not respect national borders?

Ban Ki-moon emphasized that climate change is a global issue that transcends national borders because its impacts, such as rising sea levels, extreme weather events, and biodiversity loss, affect all countries regardless of their individual contributions to greenhouse gas emissions. He argued that no nation can tackle the climate crisis alone, as its consequences are felt universally, necessitating collective action and international cooperation to effectively address and mitigate its effects. This interconnectedness highlights the need for a unified global response to ensure a sustainable future.