The news that US scientists have suggested that, globally, 2014 was the hottest year on record (remember that accurate records for the planet are a relatively recent invention) is raising some interesting issues (http://www.bbc.co.uk/news/science-environment-30852588). Many people think that this emphasises our need to try to limit the release of 'greenhouse gases' with their resulting effects on climate change (an overall increase in average world temperature does not signify that every location will be hotter all the time!). Others, I will speculate, will claim that this phenomenon is part of a natural cycle of change. The difficulty is that, if we wait for absolute, irrefutable proof, it may well turn out to be too late to reverse the effects.
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