The MRI takes pictures in the visible light spectrum and provides back-up for the HRI.

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The city would give incentives to developers to clean up the kind of sites that fell in the light to mid-range of the pollution spectrum and thus languished in state and federal clean-up programs for their lack of severity: if developers complied with environmental guidelines and submitted to oversight, they would be spared the specter of future liability.

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Simply put, this means choosing lights that shine down, not up, and that emit light only in those parts of the spectrum that the human eye can perceive.

ECONOMIST: Going, going, nearly gone