Before becoming a writer I graduated with a degree in physics from Syracuse University where I worked as an assistant in high energy physics and astrophysics laboratories. Some animals can move and some can't," Robock said. To counteract global warming, humans may someday consider spraying sulfur dioxide into the atmosphere to form clouds — and artificially cool the Earth. Although water vapor is a powerful GHG, it is not given a GWP because it is not emitted—water vapor levels are directly related to temperature, which varies based upon the concentration of other GHGs in the atmosphere. The UNFCCC uses a 100 year time horizon.? Methane (CH4), the major component of natural gas, is anthropogenically released into the atmosphere from coal mining, leaking natural gas pipelines, ruminant livestock such as cows, rice paddies, and solid waste facilities. [1] Humans also consume other carbon-based sources of energy, especially wood. The scale sets CO 2 as 1. The scale sets CO2 as 1. While China’s air pollution reduction efforts may unmask global warming, good air quality is still crucial to public health. 1. If stratospheric climate geoengineering is deployed but not sustained, its impacts on species and communities could be far worse than the damage averted. IPCC FAR (Science) at 31-35. Each GWP varies based on the time horizon that is selected. I am interested in how physics and chemistry impact our lives and telling others why they should care. Aerosols are the tiny liquid and solid particles which are suspended in the air as the result of either natural or human activity. High temperature combustion results in the creation of nitrogen oxides (NOx), which can be noxious in their own right, and when combined with volatile organic compounds, humidity, and sunlight can result in ground level (tropospheric) ozone (O3), the major component of smog, with its adverse health effects. Geoengineering takes its cue from the natural experiment that actually had made the only recent dent in global warming's rise in the last few decades — the 1991 eruption of Mount Pinatubo in the Philippines, which blasted more than 15 million tons of sulfur dioxide 21 miles high, straight into the stratosphere. Human activity increases atmospheric water vapor concentration indirectly by the emission of other greenhouse gases, such as carbon dioxide that warm the atmosphere, thereby increasing the rate of evaporation; this increased evaporation increases the amount of water vapor in the atmosphere, which further accelerates global warming. PFCs and SF6 are emitted by aluminum smelting, semiconductor manufacturing, electric power transmission and magnesium casting. See IPCC Working Group I Technical Support Unit, Meeting Report of the Expert Meeting on the Science of Alternative Metrics (2009) at http://www.ipcc.ch/pdf/supporting-material/expert-meeting-metrics-oslo.pdf.

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