United Parcel Service Inc. UPS, +0.79% said Wednesday that it will make a $450 million investment in 6,000 natural-gas-powered vehicles between 2020 and 2022 and custom-built fueling stations across the U.S. A quarter of the vehicles purchased in 2020 will run on alternative fuels, UPS says. The compressed natural gas fuel systems in the new vehicles yield up to a 90% reduction in greenhouse gas emissions for the life of the vehicle. UPS has invested more than $1 billion in alternative fuel vehicles, and fueling stations over the past decade, an effort to cut 12% of greenhouse gas emissions from the company’s ground operations by 2025. UPS operates more than 10,000 low-emissions vehicles around the world, including electric bikes, and will have 61 natural gas locations in the U.S. and abroad by the end of the year. UPS stock has rallied 16.6% for the year to date while the S&P 500 index SPX, +0.63% is up 16.3% for the period.