On a typical day, our product transportation suppliers ship more than 1.5 million products between our manufacturing sites, distribution centers, and customers. Product transportation resulted in 1.25 million tonnes of CO2 e emissions in 2017, up 4% from the prior year, primarily due to air freight associated with increased notebook PC shipments.
To improve efficiency, cut costs, and reduce environmental impact, we work to optimize our logistics network by consolidating shipments, identifying new routes, and shipping directly to customers or local distribution centers. Shifting from air to ocean freight also reduces our footprint. In 2017, we avoided 30,000 tonnes CO2 e of emissions by shifting shipments from air to ocean between Asia and the Americas, Europe, and other countries within Asia. Reducing packaging size and weight also decreases emissions.
We continue to use SmartWay® partners for 100% of our products shipped by truck in the United States and Canada. The U.S. Environmental Protection Agency (EPA) program improves road transportation efficiency and reduces GHG emissions. In 2017, for the sixth time and fourth consecutive year, we won the SmartWay large shipper Excellence Award.We require our product transportation suppliers to use the Global Logistics Emissions Framework, which we helped develop in 2016 with the Global Logistics Emissions Council, to standardize emission calculations. To drive progress across the industry and beyond, we are working with the Clean Cargo Working Group, Green Freight Asia, the International Air Transport Association, the United Nations Climate & Clean Air Coalition, and the U.S. EPA SmartWay program.