News from the US last week tells us that GM canola is capable of spreading over large distances, so it raises the question of what would happen if two EU member states sharing a land border were to take opposite views on a particular GM crop.
I was on a Wild Eye photographic safari in Kenya's Mara Triangle, sharing a land cruiser with a couple from Australia, Paul and Elise McCulloch, and our Kikuyu guide and driver, Sammy.
How do a people who share a land, customs, history and a language find a common end?
To the north it is bordered by Thailand, with which it shares a land boundary of some 300 miles (480 km).
"Ireland is our closest neighbour – the only country with which we share a land border – it is in our interest their banking system is stable.
Maryland, the only state to share a land border with the nation's capital, ostensibly had a pro-Union majority, but Confederate sympathies ran strong along the lower Chesapeake.
Compared with neighboring Kenya, which shares a land border with Somalia, Uganda has relatively lax restrictions for Somali refugees and admits about 15 each week, said Abdi Ali Jama, a leader of the Somali community in Uganda, which denounced the attacks.
These two states occupy roughly the northern fourth of the large island of Borneo and share a land boundary with the Indonesian portion (Kalimantan) of the island to the south.
Mr Osborne has presented Ireland's debacle as a threat to those interests, describing a "friend in need" whose banks are interwoven with Britain's, which shares a land border and buys more British exports than Brazil, Russia, China and India put together.Britain was right to shun the euro, Mr Osborne said, but "I told you so" does not "amount to an economic policy".
Of the eight with which it shares a land or maritime boundary, only two can be said to be happy with India: tiny Maldives, where India has the only foreign embassy and dispenses much largesse, and Bhutan, which has a policy of being happy about everything.
The Republic of Ireland is the only country to share a land border with the UK.
