Global warming is an increase in the average temperature of the Earth due to the accumulation of greenhouse gases (GHG) in the atmosphere, which is mostly caused by human activities such as burning fossil fuels and deforestation. This issue is increasingly pressing, given its far-reaching impact on ecosystems around the world. One of the biggest impacts of global warming is changes in weather patterns. As temperatures rise, extreme weather phenomena such as floods, droughts and hurricanes become more frequent. For example, floods that occur in various parts of the world, such as Southeast Asia, can destroy natural habitats and affect species that depend on these environments. Meanwhile, drought in certain areas causes a decline in flora and fauna populations, thereby disrupting the food chain. In addition, global warming also causes melting of polar ice, which contributes to sea level rise. This not only threatens coastal areas but also results in loss of habitat for species such as penguins and polar bears. As the ice melts, the previously stable tundra ecosystem now becomes an area that is more vulnerable to environmental change. Another significant impact is the impact of temperature changes on biodiversity. Certain species adapted well, but many did not survive. This can lead to the extinction of species and reduced biodiversity. For example, coral reefs, which are very sensitive to changes in water temperature, are experiencing massive bleaching, which threatens the marine life that depends on these habitats. Global warming also impacts animal migration patterns. Migrant species, such as birds and mammals, start appearing earlier or later than expected. These changes affect ecosystem interactions, including the pollination of plants that depend on certain species for reproduction. Ecosystem health is also affected by growing populations of invasive species. With higher temperatures, these species can expand their range, competing with local species that do not have adaptations to deal with such conditions. As a result, local biodiversity declines, and ecosystem health is threatened. In addition, agricultural land and water resources are also affected. High temperatures can reduce crop yields, considering that many plants and livestock require certain conditions to develop well. Climate change can make food security a serious issue throughout the world. Finally, global warming affects the carbon cycle. Forests and peatlands, which act as carbon stores, are being reduced by deforestation, exacerbating the greenhouse effect. The complex interactions between these factors highlight the importance of urgent action to reduce greenhouse gas emissions and protect ecosystems. By understanding the issue of global warming and its impact on ecosystems, we can encourage collective awareness and action to create a more sustainable future.