And throughout West Africa, where Nigeria looms huge, whether by virtue of its 105 million people, its large army or sophisticated economy, these kinds of scenarios are already causing serious worry.
That low valuation should cause serious worry on the right wing of the Tory party, many of whom have been advocating a "dash for gas" as a cure for the UK's energy woes.
Marc Horsfall, NCA senior investigating officer, said the teenager had caused "serious worry and inconvenience to thousands of people" and had "no consideration for the effect he was having on others".
Doctors worry that the long-term confinement of children in facilities where they frequently witness violence and are denied adequate schooling is causing serious psychological harm.
It involves violent contact and can cause serious injuries: worried by potential lawsuits from parents, some schools are now reluctant to risk letting their pupils play.
But this lab produces papers rather slowly, some taking up to 5 years, and my track record is causing me serious worries.
In this instance MO5(g) was happy to let Lody's letters go through as they contained information that was wildly misleading and caused serious (and needless) worry to the German High Command.
The more noticeable change, though, has happened on the Democratic side, where Sanders is actually causing some serious worry for Hillary Clinton's campaign.
Is everything okay?" Or, "I'm worried that your smoking and drug use will cause serious harm to your health". Think about whether his drug use has had a negative impact on his daily activities.
The big worry is that continued melting sea ice would cause serious feedback mechanisms to kick-in.
