The mid-layer is your insulating layer, trapping the warmth your body generates.
These very active muscles are insulated from the water by a thick layer of fatty tissue, trapping the warmth.
Finally, trap warmth at either end of the season.
The opah traps warmth from its flapping fins, which are well insulated by fat.
In 1999, planetary scientist David Stevenson of the California Institute of Technology in Pasadena, calculated that liquid water could exist if a planet had a dense atmosphere of hydrogen so dense that a greenhouse effect would trap warmth on the surface without the need for ice.
But while the report occasionally mentions that greenhouse gas emissions, which trap warmth inside our atmosphere, are largely caused by human activities like burning fossil fuels, it appears to largely downplay the scientific consensus surrounding humanity's role in causing climate change.
Greenhouse gases, by contrast, tend to trap the warmth of the sun and lead to a rise in ocean temperatures.
When Shelley was a child, she'd wrapped her scarf around her head and mouth on the way to school, trying to trap the warmth of her breath inside; these days, you hardly needed a scarf.
In cities, concrete also adds to the heat-island effect by absorbing the warmth of the sun and trapping gases from car exhausts and air-conditioner units – though it is, at least, better than darker asphalt.
But in the poly tunnel the warmth is trapped and the temperature remain consistent, replicating the environmental conditions used to grow chilli.
