Key Messages
Plants respond to their environment in a variety of wonderfully dynamic ways–although often on a time scale that most of us don't notice or with a subtlety our senses can't detect. Modern technologies let us monitor plant changes using the proportions of light reflected from leaves, which, when combined with our understanding of plant behavior, helps us to quickly assess the quality of the local environment. If we find that the environment is not healthy, then we must find the causes and whether they are a result of natural or human-influenced processes.
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