Might well be true, but I wonder how respondents would have fared when exposed to another environmental condition: exposure to scientific fact, opinion, and debate.

FORBES: Funny, But It "Feels" Like Global Warming

Under SAPS rules, there is no obligation to produce goods, but farmers must maintain their land in good agricultural and environmental condition (GAEC), the auditors say.

BBC: EU auditors deplore wasted farm aid in Eastern Europe

"The residence was of such a poor environmental condition that it was unsafe for us to breathe the air, " said Special Agent James Ash of the Bureau of Alcohol, Tobacco and Firearms, according to a sworn deposition obtained by the BBC.

BBC: Why wild animals do not make good pets

When a governing body grants the individual or business the right to utilize such property for the production of aquatic species it should be done so under the ethical intentions to one day return the trust back to the public in the same or better environmental condition.

FORBES: Why is Iceland Messing With the World's Best Fishing Regime?

Earlier assessments also indicated the rig was in good condition and posed no environmental hazard.

CNN: Alaska drilling rig towed to harbor off Kodiak Island

But if only one has a condition, it is likely that environmental factors play a relatively greater influence.

BBC: NEWS | Health | Alzheimer's risk 'is 80% genetic'

The "silent mutations" - changes in genetic material - are likely to have no obvious impact on older fathers' own children, but they may build up through subsequent generations, or interact with other genes and environmental factors, to increase the chance of their grandchildren developing the condition, the researchers say.

BBC: Grandparents 'may relay autism risk to grandchildren'