"The mix of infectious diseases and second-hand smoke is a deadly combination, " Mr Peruga said.

BBC: Passive smoking 'kills 600,000' worldwide

Lightning started some, and a deadly combination of dry conditions fuelled them: high temperatures, low humidity and strong winds.

ECONOMIST: Arson suspected

"In China we see that high sodium intakes in a lean society is a deadly combination, " says Linda Van Horn, R.

CNN: CookingLight: A 'less is more' approach to sodium

It's a deadly combination and the trick for Nadal will be to take an early lead and then deflect whatever surprises Djokovic sends his way.

WSJ: Novak Djokovic vs. Rafael Nadal: A Fitting End to the Year of the Tiger

Slowing growth and declining profits are a deadly combination.

FORBES: Apple Is The Cheapest Growth Stock You Will Ever Own

Experts believe this variant has acquired a deadly combination of producing a toxin which can damage the kidneys and being really good at sticking to the gut, allowing more bacteria to grow and ultimately produce even more toxin.

BBC: Q&A: E. coli outbreak

In the days that followed, a constant stream of reports filed by The Associated Press turned Carter into a semi-battlefield celebrity -- a combination of deadly fighting machine, insightful commentator and quipster.

CNN: 'We've got to get her off that bridge'

The combination can be deadly.

FORBES: Connect

Netscapes problem isnt that either idea--enterprise software or web portal--is a particularly bad one, its the combination and accompanying lack of focus that is deadly.

FORBES: Net confusion

The world's first patient trial is using a drug combination of Thalidomide and chemotherapy to treat small cell lung cancer, the most deadly form of lung cancer.

BBC: 'My hope for Thalidomide cure'

In combination with a narrow ledge and a fall off a steep cliff, this can prove deadly.

ECONOMIST: Monitor