The other greenhouse gases like water vapor, and methane, cycle out of the atmosphere on human timescales.

Chemical recycling of CO to new fuels and materials could thus become feasible, making them renewable on the human timescale.

If those code segments are the bodies of loops, the difference in execution time may be very noticeable on the human timescale.

The machines seemed unhurried, unconcerned with doing things on a recognisably human timescale.

And the axial tilting issues wouldn't be noticeable on human timescales.

Once you've dumped CO2 into the atmosphere, there's no getting it back, at least not on a human timescale.

What they did know was that Up There was, in human timescales, calm, ordered, regular.

On a human timescale it's a very simple place, in which nothing much changes.

Recognition that climate could change on human timescales made climate processes much more interesting research topics.

Wormholes are a popular feature of science fiction as they allow interstellar travel within human timescales.