BP and the falling price of oil - interactive video
Oil giant BP has reported lower profits and says it will cut spending on exploration because of the fall in oil prices.
Underlying profits in the final three months of 2014 were down 20% on a year earlier at $2.2bn (£1.5bn). For the full year, profits fell 10% to $12.1bn.
It comes as the price of oil has more than halved since last June.
In this interactive video, the BBC's personal finance reporter Kevin Peachey examines the effects of the oil price drop on BP and across the world.
The latest results from the oil company BP show full year profits down 10% to $12.1bn.
The BP boss says we are in a "new and challenging" time of low oil prices.
Challenging, certainly, for the oil industry.
Oil prices have more than halved since last summer for two significant reasons.
The first is falling global demand for oil.
The second is the boom in shale production in the US.
On top of this, the oil producers' cartel Opec has said it will not restrict supply as prices fall.
You can find out more about Opec in this short video.
It outlines some of the challenges its member countries face.
They are not alone.
There are some winners and losers across the world - as this feature explores.
What about your own finances?
One of the big effects is the price of petrol at the pumps.
So drivers can check on our fuel price calculator.
You can compare what you pay with national and international averages.
But it is worth noting that investors are starting to speculate that the price of oil may have reached its lowest point. Has the rebound begun?