The document discusses the future of trucks and their implications for energy and the environment. It notes that trucks are currently the second largest source of global oil demand and account for about half of diesel demand. Trucks also contribute significantly to emissions. The document presents the IEA's vision to modernize truck transport through improving efficiency with fuel economy standards, optimizing logistics, and supporting alternative fuels. This could reduce truck fuel demand and emissions substantially by 2050 while still supporting economic growth.