The recycling process has five main stages.

CNN: Turning carbon dioxide into fuel

The main task of economics has been to understand this astonishing process.

ECONOMIST: The benevolence of self-interest | The

The Cell processor and its RSX graphics companion are still separate parts, and a similar power supply capacity suggests that neither of the main chips has been built on a more efficient manufacturing process.

ENGADGET: Sony's 2012 PlayStation torn down, shows its evolved roots (update: another teardown)

Mr Harper has been the main cause and beneficiary of that process.

ECONOMIST: Canada's general election

However the main response has been to unite the parties in determination to press ahead with the process.

BBC: NI Assembly election campaigning - state of play so far

While most of the main paramilitary groups have destroyed their weapons or at least begun the process, the INLA has not decommissioned any of its arms.

BBC: Who are the INLA?

Colombia's main guerrilla force and the country's government, who have been holding talks in Sweden, say the peace process has advanced more in one week than in the past 40 years.

BBC: Colombian peace talks positive