doctors tested nitrous oxide in found they received -- receive safe and effective pain relief. the method should be considered a viable alternative for women who did not want more invasive things such as an epidural. it is affected and allows the mother to be awake during the birthing process. it is often difficult to know who you are helping, but you could be saving the life of a newborn. >> meet landon tendmen, sitting still is not his mo. >> if i wanted you to skip, show me a skip. >> he has been active since before birth. when she reached 38 weeks of pregnancy, she was worried. >> she said i cannot find anything that makes me feel good about this. how soon can you be at the hospital? >> doctor said the baby was a little anemic and needed an emergency seec-section. somehow he transfuse most of his body out -- blood out of his body in intand into paula. he needed an immediate transfusion. >> if he did not have blood, he would have died >. >> that was followed by a complete transfusion. perhaps the long listfoest four hours of their lives. >> a week later healthy as if nothing

long, low floor, by a diesel electric hybrid. 30% more fuel efficient, and it matter, 40% last nitrous oxidenitrogen dioxide, and 30% less greenhouse gas. a more efficient muni system means less congestion, reduction in harmful emissions, and improve quality of life. it means to people to visit san francisco, both from within the region and internationally and domestically, are going to look at our fleet in be envious and going to look at our network and hopefully say we can take this home and do it. we will be a laboratory for a lot of the rest of the region in the country. thank you again, dedrick -- dubie director, thank you, mayor. [applause] >>ohz today's announcement is not just good news for san francisco. it is really good news for the entire country. in the bay area, as many of us have a preference, we're part of a network of transportation providers. each one working together with the other. we're pleased to have some of our partners in delivering transit service to the bay area here today. i want to ask them to come up and say a few words, starting with the vice president of the b

in each sample, we measure carbon dioxide, methane, carbon monoxide, hydrogen, nitrous oxide, and sulfur hexafluoride. we'll take air from the bottle and send it to three different instruments. this is the one used to measure carbon dioxide. it's interesting -- the way we measure carbon dioxide is by absorption of infrared energy, which is the same principle as the greenhouse effect. so we're using the same property of the gas -- how it affects climate -- to actually measure it. then at night, we connect these suitcases that contain flask samples collected by aircraft. come back in the morning and they're all measured. combined, ground samples and aircraft -- up to 100 a day. narrator: from these hundreds of thousands of air samples, noaa has compiled a comprehensive database of climate-changing gas concentrations over a long period of time. their findings are consistent with those first discovered by david keeling. in the 1950s, keeling's first measurements showed co2 at the level of 315 parts per million. in 2005, noaa's measurements pegged co2 at 380 parts per million. beyond the stea

in each sample, we measure carbon dioxide, methane, carbon monoxide, hydrogen, nitrous oxide, and sulfurit's interesting -- the way we measure carbon dioxide is by absorption of infrared energy, which is the same principle as the greenhouse effect. so we're using the same property of the gas -- how it affects climate -- to actually measure it. then at night, we connect these suitcases that contain flask samples collected by aircraft. come back in the morning and they're all measured. combined, ground samples and aircraft -- up to 100 a day. narrator: from these hundreds of thousands of air samples, noaa has compiled a comprehensive database of climate-changing gas concentrations over a long period of time. their findings are consistent with those first discovered by david keeling. in the 1950s, keeling's first measurements showed co2 at the level of 315 parts per million. in 2005, noaa's measurements pegged co2 at 380 parts per million. beyond the steady rise in average co2 concentrations every year, noaa's data also showed that these levels fluctuate, mainly due to the capture of carbon