The sun heats the air in the greenhouse, and the hot air rises.
Though the coach has an enclosed interior, passengers usually sit topside on benches, the better to take in the passing show: the wind and sun, fresh air, wildflowers, townspeople waving and, of course, the occasional whiff of horse emissions.
Even in Birmingham, not famous for fresh air and sun, the building will generate more energy than it uses.
But it will not melt snow, build new runways to ease congestion, make the sun shine or prevent air traffic control strikes or disruptions.
The energy that comes into it from the sun is absorbed by air molecules and reradiated to space during the normal ups and downs in solar energy that occur over a roughly 11-year time span.
Steroid Cities are those fast-growth metro areas, mainly located in America's South and West, where the sun shines, the air-conditioners hum and the two languages you'll need to master in addition to English are capitalism and Spanish.
On the morning Joey Buckley got his wheelchair back, got to leave his bed and move about the hospital grounds alone, I had been up at dawn, before the Georgia sun turned the soft air yellow as butter.
The sun was out and the air was thick with restless, hormonal energy.
When the sun is low and the air is still, the implicit price of energy in my Belize home is sky high.
One of these changes, which would promote global warming, is a rise in the level of so-called greenhouse gases (particularly carbon dioxide) which trap heat from the sun and thus warm the air.
The bottlenose dolphins were moving in several groups of 15 to 20, their dorsal fins and barrel shaped torsos flashing in the sun as they came up for air.
The sun is just as bright, the air just about as balmy, and the water as warm as it ever gets.
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None, other than the anecdotal claims of Niemtsow himself and other Air Force doctors interviewed by the Sun, including Col.
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But a clear, cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more easily than they do red light.
From its front lawn you can breathe in salt air and watch seals basking in the sun.
Musicians stood onstage noodling on their instruments with the languid air of outfielders warming up in the sun.
It was the first summer I was in business, and the dry desert heat of my hometown came on strong, bringing a steady stream of customers through the door looking for ice-cold smoothies and air-conditioned relief from the scorching sun outside.
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But the ground felt damp and cold under his knees and a whiff of sulfurous air stung his lungs and the cold sun playing on his skin seemed to stir the cigarette burns to pain, and the pain brought home to him that what had happened, and what was about to happen, were no dream.
They're urged to drink plenty of water, reschedule strenuous activities, stay in air-conditioned rooms, stay out of the sun and check in on relatives and neighbors.
The air is so thin that the first glimmer of sun can throw it into violent convection, lofting up into towering thermals, twisting into dust devils, and collapsing back down as they cool.
The National Weather Service advises residents to wear lightweight and loose-fitting clothing, drink plenty of water, take frequent breaks in shaded or air-conditioned environments, stay out of the sun and check on relatives and neighbors.
The trees were naturally very colourful and the sun seemed to create conditions where it seemed like the light and air were objects themselves.
The flash itself is actually a second image of the sun, caused by refraction of its light through the layer of air closest to the sea.
After talking to constituents, perhaps they will be keen on the idea that the heat of the sun, instead of making everybody sweat, could help power the air conditioner.
As the sun went down, light shot through the smoke and turned the air around us a dark gold that cast an unsettling radiance on the trees and houses.
One of the groups will take to the air above Panama in a transport plane to better study the sun's corona.
The house itself had an open-air courtyard, intimately connected to the gardens and the sea by large rooms that could be opened in such a way that no walls interrupted the flow of people or air from the patios to the courtyard, which was filled with sun and palm trees.
There is no sign to mark it, just a sprawl of heavy, dark, tropical hardwood left to dry and age in the sun and a couple of half-finished canoes in front of the open-air shed where he does his work.
It was a day that could have happened only in a town like ours: the sun was bright, warm even, but there was a chemical haze in the air, a blurred, dusty quality to the light that we knew from having lived so long in the shadow of the works.
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