Climate change is defined as a long-term change in weather patterns caused by human activity like greenhouse gas emissions. The effects of climate change include rising sea levels, changing precipitation patterns, retreating glaciers and sea ice, and species extinctions. Individual actions like adjusting computer power settings, using energy efficient appliances, and recycling electronics can help reduce greenhouse gas emissions and energy consumption to mitigate climate change. The document provides tips individuals can take to lead more environmentally friendly lifestyles.