Sentence examples for a safe limit of from inspiring English sources
World Health Organization guidelines set a safe limit of 10 parts per billion of arsenic in water supplies, but tens of millions of people in the world drink unsafe water above that level, researchers said.
The airlines at this time are working to a safe limit of four milligrams of ash per cubic metre of air.
Thus assuming a "safe" limit of 30 cmH2ofof airway pressure the resulting transpulmonary pressure can vary from 27.1 to 23.8 cmH2O passing from a safe zone to a probably unsafe zone.
Dr Toby Hillman, one of the report's authors from the Royal College of Physicians, said: "There isn't a safe limit for the amount of pollution that's been defined as yet and we know the effects of poor air quality run from cradle to grave.
These experts recommended a safe limit for dietary exposure of 0.4 μg/kg body weight per day, corresponding to a hair mercury concentration of about 6 μg/g.
But the very definition of a safe limit for chemicals such as glyphosate is contested, and linked to a broader regulatory divide between the US's risk-based approach which errs towards product approvals where doubt cannot be quantified, and the EU's hazard-based approach, which leans towards a precautionary principle in such situations.
Hansen has long argued that humanity should move towards a safe limit for CO2 in the atmosphere of 350ppm - a value that the organisation 350.org takes its name from – moving that boundary up or down as new evidence comes in.
When it comes to cancer prevention, there isn't considered to be any "safe limit" of alcohol consumption.
"It's worrying that land use has already pushed biodiversity below the level proposed as a safe limit," said Prof Andy Purvis, of the Natural History Museum, and one of the authors.
California scientists have recommended a public health goal of 0.02 ppb, but industry pressure led to the adoption in 2014 of a legal safe limit of 10 ppb.
Using the abstinent group as the baseline comparator can be substantiated given the lack of a known lower safe limit of alcohol use for sex.
