This document discusses climate change and its effects in Pakistan. It defines climate change as long-term changes in weather patterns around the world caused by both human and natural factors. The two largest contributors of greenhouse gases are China and the US. Developing countries like Pakistan are more vulnerable to the impacts of climate change, such as rising sea levels, melting glaciers, increased storms, floods, and diseases. The main human causes of climate change discussed are ozone depletion from CFCs, deforestation which reduces carbon absorption, and the greenhouse effect from heat-trapping gases.