But it is hardly a major source of emissions.
Electricity generation was the largest source of emissions, accounting for 34% in 2014-15.
And then there is aviation, the fastest-growing source of emissions.
Coal-fired plants are a major source of emissions associated with global warming.
The machines also allow scientists to pinpoint the source of emissions.
"It will be a chronic source of emissions that will last hundreds of years".
Nor do they affect transmission and distribution pipelines, which are most likely a big source of emissions.
The findings, included in a report, "Dirty Air, Dirty Power," were immediately attacked by industry groups as a "repackaged" argument that focused on only one source of emissions.
"It's vital the Commission tackles Europe's transport emissions, which will be the largest source of emissions by 2030," said Colin Roche, a campaigner for the group.
Cuttino said the standards were a serious step towards reducing greenhouse gases in transport, the fastest growing source of emissions in the US.
The paper mills are still our greatest single source of emissions, but print emissions have continued to fall and are down to 61% from 67% in 2012/13.
