The level of success of these technologies will be country-specific so unlike other limiting factors, success and failure will be local.

FORBES: Smarter Things

He told BBC News that while bananas and plantains also have limiting factors, they may be a good substitute for potatoes in certain locations.

BBC: Bananas could replace potatoes in warming world

The OM-D EM-5 has a bunch of fun art filters, but the .jpg files right out of the camera are nothing to sneeze at either, and in most cases the limiting factors in image quality are the lens and photographer, not the sensor.

FORBES: Connect

He said the company had sought to be conservative in its rollout by limiting the test to women with risk factors and recommending that it be administered in conjunction with genetic counseling.

WSJ: New Questions on Cutting-Edge Prenatal Tests

Finally, the number of cancer cases was small, limiting the ability to dissect the impact of different factors.

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The government was looking instead at limiting access to benefits and the NHS to reduce the "pull factors" that encouraged migrants to come to the UK, she added.

BBC: UK will not extend Romania and Bulgaria migration curbs