"Efficiency improvements" refers to actions or changes made to a process or system that make it operate more effectively and produce better results in less time, cost, or effort. Full definition
Nevertheless, you can still receive federal tax credits if you have made energy efficiency improvements in prior years. (energysage.com)
This system allows for a 70 % reduction in energy loss compared to internal combustion cars and accounts for 40 % of fuel efficiency improvement of hybrid vehicles. (greencarcongress.com)
The new nine - speed automatic offers a fuel efficiency improvement of up to 2 % compared to a six - speed transmission. (greencarcongress.com)