reduction of cost

例句：

1. 1.The cost of the new product has been reduced by 20%.
   新产品的成本已经降低了20%。
2. 2.The government is reducing its spending on welfare programs.
   政府正在减少其对福利项目的支出。
3. 3. The company plans to reduce its carbon footprint by using renewable energy sources.
   该公司计划通过使用可再生能源来减少其碳足迹。