How have human changed the atmosphere in the past 200 years?

In the past 200 years, human activities, particularly the burning of fossil fuels, deforestation, and industrial processes, have significantly increased concentrations of greenhouse gases like carbon dioxide and methane in the atmosphere. This has led to global warming and climate change, resulting in rising temperatures, altered weather patterns, and more frequent extreme weather events. Additionally, air pollution from industrial emissions and vehicle exhaust has degraded air quality and affected human health and ecosystems. Overall, these changes have profound implications for the planet's climate and environmental stability.