It is even more difficult when trying to put pressure on the source of the problem.
The best source of pressure is the knowledge that there may never be a better chance than now.
The greatest source of downward pressure on South-East Asia's currencies comes from local firms desperate to service their foreign debts.
In recent weeks, the floors in that part of the mine had been "heaving, " or buckling up, from intense pressure, said the source, who has intimate knowledge of the conditions in the mine.
CNN: Camera lowered into mine cavity shows 'survivable space'
Additionally, making the internet the only source for games would put a lot of pressure on both brick-and-mortar and online retailers that sell games.
If you're looking for more technical details you'll find a link to the recently published paper titled, Dexterous manipulation of microparticles using Bessel-function acoustic pressure fields at the source.
Of the 700 teachers who completed the ATL questionnaire, 52% thought pressure to be popular on social networking sites was also a source of strain.
"These are spectacular numbers, better than the GDP and employment reports suggested, and confirm that the labour market is not at the moment the source of anything that could be plausibly described as inflationary pressure, " said Ian Shepherdson of High Frequency Economics.
Fracking involves the injection of water containing a surfactant and various other chemicals under high pressure into a source rock e.g. shale, causing the latter to fracture and release natural gas (principally methane).
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