These graphs show the changes in emissions drivers in the Power, Buildings, Industry, Transportation, and Agriculture sectors in US
Power Power sector variables and impact on average emissions factor
The expansion and increased availability of nuclear in the 1980s and 1990s offset growing emissions from coal. In the 2000s, most factors were aligned to improve emissions intensity, including increasing renewables output and gas replacing coal.
Industry Energy intensity by sector
As manufacturing grew, industrial sectors generally improved their energy intensity, but in some cases performance declined. Structural changes to U.S. industry led to lower emissions intensity.
Buildings Contribution of key drivers to increase or decrease of annual buildings emissions
Growth in population and floor space per person were the largest drivers of buildings emissions. In the late 2000's, energy efficiency gains caught up with slowing floor space growth.
Transport Emissions intensity
Large gains in vehicle engine and transmission efficiency did not result in significant fuel efficiency gains, as cars became heavier. There was little shifting between transport modes (not shown).