Our goal is to create trucking advancements that deliver more savings to our customers and cleaner air. Weâre aiming to make our fleet 100% more energy efficient by 2015. This includes keeping 26 billion pounds of carbon dioxide out of the air between now and 2020.
add-on therapy. Any treatment given to bolster or enhance the effectiveness of a previous one, esp. when the first treatment proved not to be fully effective.
1. add-on-a component that is added to something to improve it; the addition of a bathroom was a major improvement; the addition of cinnamon improved the flavor. addition, improver. additive-something added to enhance food or gasoline or paint or medicine.