A good resource for basic questions/misunderstandings such as these: https://www.nap.edu/resource/25733/interactive/ https://www.nap.edu/resource/25733/interact

A good resource for basic questions/misunderstandings such as these: https://www.nap.edu/resource/25733/interactive/ https://www.nap.edu/resource/25733/interactive/ > How do scientists know that recent climate change is largely caused by human activities? > Scientists know that recent climate change is largely caused by human activities from an understanding of basic physics, comparing observations with models, and fingerprinting the detailed patterns of climate change caused by different human and natural influences. > Climate is always changing. Why is climate change of concern now? > All major climate changes, including natural ones, are disruptive. Past climate changes led to extinction of many species, population migrations, and pronounced changes in the land surface and ocean circulation. The speed of the current climate change is faster than most of the past events, making it more difficult for human societies and the natural world to adapt.