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...children's lifetimes. However, when the oil wells run dry is not the key question - or at least not the one likely to affect our or the next generation. Instead, the key question is whether we can produce enough oil to satisfy global demand. Consider Figure 6, produced in 2003 by members of the campaigning organisation the Association for the Study of Peak Oil. The figure...

...research operations to a 'ready for servicing' condition and capture attitude, then the aperture door was closed and high-gain antennas stowed. Astronauts on board a Space Shuttle made five gruelling space-walks to carry out the installation work. Once this was completed and tested, both Hubble and the Shuttle were configured for battery charging. When charged, everything...

...centre poverty garbage bin washing dishes local council Discussion A system is a selection of variables based on a particular perspective. In describing a system there needs to be not only objects or variables of some kind, but a human-attached perspective with an associated purpose. So for example, a garbage bin in itself would not normally be regarded as a system. It...