Air
in sentence
4777 examples of Air in a sentence
It was wonderfully cool inside because of its huge thermal mass, natural convection of
air
rising up through the oculus, and a Venturi effect when wind blows across the top of the building.
Automotive energy consumption and
air
pollution will be cut dramatically.
Right now there's a person who can tell an audience to put their hands up in the
air
and they will stay there till he says, "Put them down."
Each streaking dot represents a passenger plane, and by turning
air
traffic data into time-lapse imagery, we can see something that's above us constantly but invisible: the vast network of
air
travel over the United States.
And by tracking markers on an insect's wings, we can visualize the
air
flow that they produce.
So under an endless rain of cosmic dust, the
air
is full of pollen, micro-diamonds and jewels from other planets and supernova explosions.
Four hundred parts per million: that's the approximate concentration of CO2 in the
air
today.
That's the challenge we're facing when capturing CO2 directly out of the
air.
Sounds pretty easy, pulling CO2 out of the
air.
So now what we have to think about is going back; pulling CO2 back out of the
air.
Now, the earth naturally removes CO2 from the
air
by seawater, soils, plants and even rocks.
Thanks to human ingenuity, we have the technology today to remove CO2 out of the
air
using a chemically manufactured approach.
This is called an
air
contactor.
You can see it has to be really, really wide in order to have a high enough surface area to process all of the
air
required, because remember, we're trying to capture just 400 molecules out of a million.
Using the liquid-based approach to do this, you take this high surface area packing material, you fill the contactor with the packing material, you use pumps to distribute liquid across the packing material, and you can use fans, as you can see in the front, to bubble the
air
through the liquid.
The CO2 in the
air
is separated [by] the liquid by reacting with the really strong-binding CO2 molecules in solution.
But there's an optimization, because the deeper you make that contactor, the more energy you're spending on bubbling all that
air
through.
So
air
contactors for direct
air
capture have this unique characteristic design, where they have this huge surface area, but a relatively thin thickness.
And so recycling the material requires an enormous amount of heat, because think about it: CO2 is so dilute in the air, that material is binding it really strong, and so you need a lot of heat in order to recycle the material.
And to recycle the material with that heat, what happens is that concentrated CO2 that you got from dilute CO2 in the
air
is now released, and you produce high-purity CO2.
So I ask a question: How much energy do you think it takes to remove a million tons of CO2 from the
air
in a given year?
It takes a power plant to capture CO2 directly from the
air.
They have a clever approach that allows them to co-capture the CO2 from the
air
and the CO2 that they generate from burning the natural gas.
The land area required for a synthetic forest or a manufactured direct
air
capture plant to capture the same is 500 times smaller.
So knowing that direct
air
capture is one front in our fight against climate change, imagine that we could invest 20 percent, 20 billion dollars.
So if you use natural gas to do direct
air
capture, you only end up capturing about a third of what's intended, unless you have that clever approach of co-capture that Carbon Engineering does.
You know, at times of technical innovation, designers want to be influenced by what's in the
air.
The average elite female gymnast shrunk from 5'3" to 4'9" on average over the last 30 years, all the better for their power-to-weight ratio and for spinning in the
air.
How do
air
pollution and climate coexist?
Can we change things that affect
air
pollution and climate at the same time?
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