This document discusses the causes, effects, and responses to global warming. It states that increased levels of greenhouse gases like carbon dioxide and methane in recent years are largely due to human activities such as burning fossil fuels, waste dumping, and deforestation. This has led to effects like changes in weather patterns, rising sea levels, and more frequent extreme weather events. Some responses that could help mitigate global warming mentioned include reducing methane emissions from agriculture and switching to renewable energy sources like solar power.