Recently, Caldeira and colleagues at Carnegie and Stanford set out to examine whether the techniques of solar-radiation management would disrupt the sensitive agricultural balance on which the earth depends.

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"The human brain is sensitive to the electromagnetic radiation emitted by cell phones, but for the brain to be impacted, the cell phone has to be close to the head, " Volkow said.

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However, such instruments are blinded by the intense infrared radiation emitted by flames, which overwhelm the sensitive detectors and limit their use in the field.

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