They can be influenced by other objects and the icy ones can off-gas propulsively.
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The sources of these toxins and poisons are often easy to isolate: a leaking roof can cause mold, houses built before 1978 may have lead paint and plywood can off-gas formaldehyde.
Cyprus has recently discovered significant off-shore gas deposits, and major energy companies have shown an interest in tapping those resources.
This week it announced plans to put half a million gas-powered vehicles on its roads by 2011, to reduce oil dependence and provide a market for the off-shore gas fields it is developing.
There is not much incentive to take the foot off the gas-pedal and apply the brakes just yet.
The key is to not take our foot off the gas - just keep working hard and keep improving.
As well as promoting a more efficient industry, that will mean weaning Koreans off their gas-guzzlers and improving mass transit.
Last year, China auctioned off its shale-gas blocks for the first time.
Focusing on high-margin drilling technology and tools, Duroc-Danner spun off the drill-pipe business as Grant Prideco in 2000 and sold off capital-intensive barge rig and gas-compression businesses.
Moscow's flexing of its muscles in the energy sector - which saw state-owned firm Gazprom temporarily cut off gas supplies to neighbouring Ukraine - as well as new rules for the foreign ownership of Russian companies and export tax rises, all have implications for BP.
There are tens of billions of barrels of oil--not to mention gobs of natural gas--off the U.S.' coasts, yet Congress has declared 85% of the U.S. Outer Continental Shelf off-limits to exploration and drilling.
Focusing on high-margin drilling technology and tools, Duroc-Danner spun off the drill-pipe business as Grant Prideco (nyse: GRP - news - people ) in 2000 and sold off capital-intensive barge rig and gas-compression businesses.
Each LNG In A Box unit is fully equipped with a gas pre-treatment system, cold box assembly and boil off gas compressor as well as a GE's turboexpander compressor, high-speed reciprocating compressor, electric motor, driver and control system.
In one egregious example, a barber claimed tax credits for his purchases of 25, 000 gallons worth of gas for off-highway business use.
In January 2004 it confessed to the problem, eventually slicing 4.5 billion barrels of oil-and-gas equivalents off proved reserves, which now stand at 11.5 billion barrels.
PTT's bid is the biggest ever by a Thai firm for a foreign one, and underscores the rush for oil-and-gas assets off the east African coast.
Most of the U.S. Outer Continental Shelf is off-limits to oil and gas exploration and production, even though there are upward of 100 billion barrels of oil and immense amounts of natural gas estimated to be there.
This, together with news of oil being discovered in Turkana in the north-west and the possible gas deposits off the Lamu coast gives Vision 2030 much-needed impetus.
There was a ripple of fear in Britain when test-drilling for shale gas in north-west England set off small earth tremors, but the evidence so far suggests that earthquakes should not be a worry.
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Mr Morales scared off investment by nationalising the natural-gas industry, telecoms and parts of mining.
Gibbs sold off his second-rate oil and gas fields and renamed the company.
Extrapolate that problem to the Gulf's 4, 000 rigs (where 60% of oil and 40% of gas production remains off-line) and Katrina's impact will be felt on the American oil patch for many yearsto come.
The idea of obtaining more energy from off-shore and Arctic oil and gas deposits and accelerating the construction of a new generation of nuclear plants will continue to receive at least presidential lip service.
Extrapolate that problem to the Gulf's 4, 000 rigs (where 60% of oil and 40% of gas production remains off-line) and Katrina's impact will be felt on the American oil patch for many years to come.
Meanwhile, Turkey's mercurial prime minister, Recep Tayyip Erdogan, is hinting at war over Greek-Cypriot drilling for gas off Cyprus's southern coast, prompting a sharp rebuke from the Americans.
Reliance, controlled by billionaire Anil Ambani, has been unable to get a massive gas-fired plant off the ground in northern India despite a decade of effort, because of land issues and fuel-shortage issues.
In Texas, the birthplace of the shale-gas revolution, there is currently a stand-off between the federal Environmental Protection Agency and the state Railroad Commission, which regulates oil and gas production.
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Dallas-based Kosmos has a juicy position in a host of newly discovered oil and gas fields off the coast of Ghana, including a quarter-stake in Jubilee, thought to hold upwards of 2 billion barrels of oil and gas equivalents.
Sales of its high-margin, gas-guzzling SUVs, like the Explorer and Expedition, are off 28% so far this year.
The 12 gas balloons took off from Gap-Tallard in France almost 24 hours ago.
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