Climate change is a phenomenon caused by increased greenhouse gas emissions, which causes global temperatures to rise. The impact on the global ecosystem is significant and disturbing, affecting biodiversity, weather patterns and the ecosystem itself. In this context, let’s explore some of the main impacts of climate change. One of the direct impacts of climate change is increasing global average temperatures. This trend causes animal and plant habitats to become less conducive. For example, species that depend on certain temperatures to survive, such as penguins in Antarctica, face the risk of extinction. Rising temperatures also cause the migration of species to colder regions, giving rise to changes in biodiversity and inter-species interactions. Climate change also contributes to rising sea levels due to melting polar ice. This rise threatens coastal ecosystems such as mangroves and coral reefs, which serve as natural protection for many marine species. Coral reefs, which are sensitive to changes in temperature, are experiencing bleaching resulting in loss of habitat for many fish and other marine organisms. The greenhouse effect also influences rainfall patterns around the world. Some areas experience increased rainfall, while others become dry. This causes floods on the one hand and drought on the other, affecting agriculture and people’s survival. Prolonged droughts can disrupt food production, while floods can destroy agricultural land. Climate change also has a significant impact on terrestrial ecosystems. Forests, which are major carbon sinks and home to various species, are threatened by increasingly frequent forest fires. These fires not only reduce forest area, but also disrupt the carbon cycle and emit more CO2 into the atmosphere. Ocean acidification, due to increasing CO2 levels in the atmosphere, is also damaging marine ecosystems. Shelled organisms, such as mollusks and corals, have difficulty building their shells, which can affect the entire maritime food chain. This damage to coral reefs and light organisms destabilizes the balance of the ecosystem, ultimately impacting mariners and communities who depend on marine resources. Threatened biodiversity also results in shifts in interaction patterns between predators and prey, and disrupts important ecosystem processes such as pollination. Species that cannot adapt quickly to these changes risk extinction, drastically changing the community structure of ecosystems. Climate change mitigation efforts are very important to minimize its impact on the global ecosystem. Reducing greenhouse gas emissions, protecting and restoring habitats, and implementing environmentally friendly technologies must be a priority. Educating the public about the importance of sustainability and environmental preservation is the first step to facing this big challenge.