But I think the reason is that you have to be rather dedicated to spot it because these plumes are only perhaps 50m to 100m across.

BBC: Methane seeps from Arctic sea-bed

Under present UN resolutions these can only be entered after making tedious special arrangements, which rules out spot checks.

ECONOMIST: We will prevail | The

Although taxes for investment properties have been traditionally softer than for other types of investing, second homes seem to be a gray spot for the IRS. All rental losses are passive losses or hobby losses, and these can only be used against--written-off against--income from other passive activities like other rentals, a private partnership you don't help operate or an S-corporation.

FORBES: Vacation Home Survival Guide