Dr. J. William Hirzy, a chemistry professor at American Universiy, rests outside the rally route with a graph he uses to teach his students about the relationship between atmospheric carbon dioxide and global temperature. (NPR)
{"Image ImageDescription": "Dr. J. William Hirzy, a chemistry professor at American Universiy, rests outside the rally route with a graph he uses to teach his students about the relationship between atmospheric carbon dioxide and global temperature.", "Image Make": "Canon", "Image Model": "Canon EOS 5D Mark II", "Image Orientation": "Horizontal (normal)", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS4 Macintosh", "Image DateTime": "2013:02:17 21:01:23", "Image Artist": "Daniel M.N. Turner", "Image ExifOffset": "480", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1038", "Thumbnail JPEGInterchangeFormatLength": "7859", "EXIF ExposureTime": "1/1250", "EXIF FNumber": "9/2", "EXIF ExposureProgram": "Manual", "EXIF ISOSpeedRatings": "500", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2013:02:17 16:09:02", "EXIF DateTimeDigitized": "2013:02:17 16:09:02", "EXIF ShutterSpeedValue": "321491/31250", "EXIF ApertureValue": "86797/20000", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF SubjectDistance": "157/100", "EXIF MeteringMode": "Spot", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "16", "EXIF SubSecTime": "16", "EXIF SubSecTimeOriginal": "16", "EXIF SubSecTimeDigitized": "16", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "2400", "EXIF ExifImageLength": "1600", "EXIF FocalPlaneXResolution": "5616000/1459", "EXIF FocalPlaneYResolution": "1872000/479", "EXIF FocalPlaneResolutionUnit": "2", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Manual Exposure", "EXIF WhiteBalance": "Manual", "EXIF SceneCaptureType": "Standard"}