There is a growing conviction that the only real prospect for our long-term energy provision relies on the ability to collect and store sunlight in the form of chemical potential. The creation of artificial systems to exploit the basic chemistry of photosynthesis to produce hydrogen or other fuels is a concept that crops up each time there is an escalation in the price of oil. In addition, we need to mop up the excess carbon dioxide left over from our present era of profligate fossil fuel consumption. The net result is an upsurge in the urgency to design effective artificial photosynthetic systems. This is a global problem which grows more important on a daily basis and it will soon become the dominant scientific issue.

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