To "reduce" means to make something smaller or less in amount, size, or degree. This can apply to various contexts, such as reducing waste, which involves minimizing the amount of trash produced, or reducing costs, which means lowering expenses in a budget. In everyday life, people often seek to reduce their carbon footprint by using less energy or driving less. This effort contributes to environmental sustainability and helps combat climate change. By making small changes, individuals can significantly reduce their impact on the planet and promote a healthier ecosystem for future generations.