Greenhouse gases are gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of thermal infrared radiation emitted by the Earth’s surface, the atmosphere itself, and by clouds. This property causes the greenhouse effect. Greenhouse gases are essential to maintaining the temperature of the Earth; without them the planet would be so cold as to be uninhabitable. Anthropogenic sources of greenhouse gases include modern industrial, transportation, residential, commercial and agricultural processes. Venus and Mars also have atmospheric gases that cause greenhouse effects.
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| - Greenhouse gases are gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of thermal infrared radiation emitted by the Earth’s surface, the atmosphere itself, and by clouds. This property causes the greenhouse effect. Greenhouse gases are essential to maintaining the temperature of the Earth; without them the planet would be so cold as to be uninhabitable. Anthropogenic sources of greenhouse gases include modern industrial, transportation, residential, commercial and agricultural processes. Venus and Mars also have atmospheric gases that cause greenhouse effects.
- A greenhouse gas is a gas that makes the greenhouse effect work. Examples of greenhouse gases are methane, carbon dioxide, and nitrous oxide.
- Greenhouse gases are components of the atmosphere that contribute to the Greenhouse effect. Some greenhouse gases occur naturally in the atmosphere, while others result from human activities. Naturally occurring greenhouse gases include water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Certain human activities add to the levels of most of these naturally occurring gases.
- Greenhouse gases are gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of thermal infrared radiation emitted by the Earth’s surface, the atmosphere itself, and by clouds. This property causes the greenhouse effect. Greenhouse gases are essential to maintaining the temperature of the Earth; without them the planet would be so cold as to be uninhabitable. Natural sources are the Earth's ecosystem, and anthropogenic sources include industrial, transportation, residential, commercial and agricultural processes. Venus, Mars and Titan also have atmospheric gases that cause greenhouse effects.
- A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in the Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Greenhouse gases greatly affect the temperature of the Earth; without them, Earth's surface would average about 33 °C colder, which is about 59 °F below the present average of . __TOC__
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- the underlying mechanism is obscure. What changes do they trigger? How do they do this, under what conditions? Give examples of the broad ramifications
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| - Cumulative energy-related emissions between the years 1850–2005 for individual countries.
- This graph shows changes in the annual greenhouse gas index between 1979 and 2011. The AGGI measures the levels of greenhouse gases in the atmosphere based on their ability to cause changes in the Earth's climate.
- Bar graph of cumulative energy-related per capita emissions between 1850–2008 for 185 countries.
- Regional trends in annual per capita emissions from fuel combustion between 1971 and 2009.
- Cumulative energy-related emissions between the years 1850–2005 grouped into low-income, middle-income, high-income, the EU-15, and the OECD countries.
- Map of cumulative per capita anthropogenic atmospheric emissions by country. Cumulative emissions include land use change, and are measured between the years 1950 and 2000.
- Regional trends in annual emissions from fuel combustion between 1971 and 2009.
- Bar graph of annual per capita emissions from fuel combustion for 140 countries in 2009.
- Modern global CO2 emissions from the burning of fossil fuels.
- This bar graph shows global greenhouse gas emissions by sector from 1990 to 2005, measured in carbon dioxide equivalents.
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| - Cumulative energy-related carbon dioxide emissions between 1850-2005 for different countries.png
- Yearly trends in annual regional carbon dioxide emissions from fuel combustion between 1971 and 2009.png
- CO2 responsibility 1950-2000.svg
- Global Carbon Emissions.svg
- NOAA Annual Greenhouse Gas Index 2012.png
- Regional trends in annual per capita carbon dioxide emissions from fuel combustion between 1971 and 2009.png
- Global greenhouse gas emissions by sector, 1990-2005, in carbon dioxide equivalents .png
- Cumulative energy-related carbon dioxide emissions between 1850-2005 for low-income, middle-income, high-income, the EU-15, and OECD countries.png
- Annual per capita carbon dioxide emissions from fuel combustion in 2009 for 140 countries.png
- Cumulative energy-related per capita carbon dioxide emissions between 1850-2008 for 185 countries.png
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| - Greenhouse gases are gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of thermal infrared radiation emitted by the Earth’s surface, the atmosphere itself, and by clouds. This property causes the greenhouse effect. Greenhouse gases are essential to maintaining the temperature of the Earth; without them the planet would be so cold as to be uninhabitable. Anthropogenic sources of greenhouse gases include modern industrial, transportation, residential, commercial and agricultural processes. Venus and Mars also have atmospheric gases that cause greenhouse effects.
- A greenhouse gas is a gas that makes the greenhouse effect work. Examples of greenhouse gases are methane, carbon dioxide, and nitrous oxide.
- Greenhouse gases are components of the atmosphere that contribute to the Greenhouse effect. Some greenhouse gases occur naturally in the atmosphere, while others result from human activities. Naturally occurring greenhouse gases include water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Certain human activities add to the levels of most of these naturally occurring gases.
- A greenhouse gas (sometimes abbreviated GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in the Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone. Greenhouse gases greatly affect the temperature of the Earth; without them, Earth's surface would average about 33 °C colder, which is about 59 °F below the present average of . Since the beginning of the Industrial Revolution (taken as the year 1750), the burning of fossil fuels and extensive clearing of native forests has contributed to a 40% increase in the atmospheric concentration of carbon dioxide, from 280 ppm in 1750 to 392.6 ppm in 2012. It has now reached 400 ppm in the northern hemisphere. This increase has occurred despite the uptake of a large portion of the emissions by various natural "sinks" involved in the carbon cycle. Anthropogenic carbon dioxide (CO2 ) emissions (i.e., emissions produced by human activities) come from combustion of carbon-based fuels, principally wood, coal, oil, and natural gas. Under ongoing greenhouse gas emissions, available Earth System Models project that the Earth's surface temperature could exceed historical analogs as early as 2047 affecting most ecosystems on Earth and the livelihoods of over 3 billion people worldwide. Greenhouse gases also trigger ocean bio-geochemical changes with broad ramifications in marine systems. In the Solar System, the atmospheres of Venus, Mars, and Titan also contain gases that cause a greenhouse effect, though Titan's atmosphere has an anti-greenhouse effect that reduces the warming. __TOC__
- Greenhouse gases are gaseous constituents of the atmosphere, both natural and anthropogenic, that absorb and emit radiation at specific wavelengths within the spectrum of thermal infrared radiation emitted by the Earth’s surface, the atmosphere itself, and by clouds. This property causes the greenhouse effect. Greenhouse gases are essential to maintaining the temperature of the Earth; without them the planet would be so cold as to be uninhabitable. Natural sources are the Earth's ecosystem, and anthropogenic sources include industrial, transportation, residential, commercial and agricultural processes. Venus, Mars and Titan also have atmospheric gases that cause greenhouse effects.
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