This problem reaches across continental boundaries since emissions of NOx influence photochemistry on a hemispheric scale. (ipcc.ch)
Kaspi, Y., and T. Schneider, 2011: Winter cold of eastern continental boundaries induced by warm ocean waters. (climate-dynamics.org)
If you lost loved ones in a plane crash or helicopter crash, we can investigate your claim, determine who was at fault and seek justice on your behalf, across continental boundaries if necessary. (colson.com)