Auto manufacturers wouldsave a bundle on healthcare premiums, and most workers would see HSAs as a positive step up from their current plans: If a worker is blessed with good health, he would build up a nice pile of cash that belonged to him.

FORBES: Fact and Comment

She said the visits were becoming more common and helped Ofsted build up a good picture of the health of education in a local authority.

BBC: Primary classroom generic image

In America, new tax breaks on health savings accounts make it attractive for individuals to build up nest-eggs to pay for their increased share of the cost.

ECONOMIST: There must be a better way

Spills would also be a health risk, since carbon dioxide is heavier than air, and so can build up in low-lying or poorly ventilated spots.

ECONOMIST: Carbon capture and storage

CO2 can build up in confined spaces and high levels of CO2 can produce a variety of health effects that can affect sleep, like headaches, dizziness, restlessness, difficulty breathing, increased heart rate and sweating.

FORBES: French Connected Device Company Brings Smart Scales to CES