The price signal also implies the poorest often pay the heaviest costs.

For example, commercially over-fishing a region may mean fish from that area becomes harder to catch and more expensive, possibly allowing that ecosystem time to recover (though that is not guaranteed, either).

In contrast, the since 1980 the anomaly has been consistently positive.

As environmental engineer, D Kelly O’Day, explained on Processing (link no longer available): To facilitate assessments of long term trends, climatologists compare the mean for a base period with the annual mean.

As greenhouse gas emissions from energy production, industry and vehicles have increased, temperatures have climbed, most notably since the late 1970s.

Source: NASA Finds 2014 Warmest Year in Modern Record, NASA Goddard Institute for Space Studies, January 16, 2015 we are using Earth’s resources is not sustainable.

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