An early strain of research claimed that when we watch television, our brains mostly exhibit slow alpha waves—indicating a low level of arousal, similar to when we are daydreaming.
Other studies show that simply providing the facility for people to compare their energy use with the local average is enough to cause them to modify their behaviour.
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Scientists have worried for years about ocean acidification affecting shelled creatures in the future, but according to a new study, it's already happening, and has been for over a hundred years.