Methane hydrates are frozen water molecules that trap methane gas molecules in a crystalline, lattice-like structure known as a hydrate.

FORBES

Fortuna has also provided economic assistance in building 11 dams in heavily arid areas for farmers to trap water and distribute it to their homes.

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Coal beds often double as aquifers, and to remove the gas thousands of gallons of water (which trap it in the coal) must be got out first.

ECONOMIST: Energy supplies

He has proposed deploying a million plastic tubes, each about a hundred metres long, to roil the water, which would help it trap more CO2.

NEWYORKER: The Climate Fixers

No, because so little progress has been made on ways to trap and use this water when it cascades down in a short space of time.

ECONOMIST: Climate change

Eighteen British soldiers were killed later that day when two booby-trap bombs exploded beside Narrow Water Castle near Warrenpoint in County Down.

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This bare, sandy earth then becomes an effective rain trap - with no vegetation, water cannot be lost through transpiration (the evaporation of water from plants).

BBC: Termites 'engineer fairy circles'

In one strait, a pod of whales appears, blowing spouts under the water to create a net of bubbles in which to trap a meal of krill.

FORBES: Go with the Floe

In December, North Wales Police divers searched Trap Pool, a popular angling spot at a water-filled claypit at Buckley.

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But could little Cyprus , figuratively speaking, be the thin sheen of water that flipped my Corvair from a fun buggy into a death trap?

FORBES: Cyprus -- The Nightmare Scenario