That means that it has to be economically attractive to get those barrels out of the ground, which suggests a price upwards of $70 a barrel.

And, finally, by implementing better standards in packaging design and after-use systems to make it economically attractive to recycle the remaining 50 per cent.

As new properties opened, a programme of disposals of the older, less economically attractive hotels was initiated.

Production of horsemeat was not economically attractive, and raising of the breed was largely abandoned.

However, nuclear reprocessing becomes more economically attractive, compared to mining more uranium, as uranium prices increase.