Greenhouse gases

Introduction What are greenhouse gases? As the shortwave energy that in the visible and ultraviolet portion of the spectra heats the surface, longer-wave infrared energy heat is reradiated to the atmosphere.

Greenhouse gases

Greenhouse Gas (GHG) Emissions | US EPA

The average surface temperature of Earth is maintained by a balance of various forms of solar and terrestrial radiation. Fourier, however, neither used the term greenhouse effect nor credited atmospheric gases with keeping Earth warm. This radiation, unlike visible light, tends to be absorbed by the greenhouse gases in the atmosphere, raising its temperature.

Despite its name, the greenhouse effect is different from the warming in a greenhouse, where panes of glass transmit visible sunlight but hold heat inside the building by trapping warmed air.

Created and produced by QA International. Although the greenhouse effect is a naturally occurring phenomenon, it is possible that the effect could be intensified by the emission of greenhouse gases into the atmosphere as the result of human activity.

From the beginning of the Industrial Revolution through the end of the 20th century, the amount of carbon dioxide in the atmosphere increased by roughly 30 percent and the amount of methane more than doubled.

A number of scientists have predicted that human-related increases in atmospheric carbon dioxide and other greenhouse gases could lead by the end of the 21st century to an increase in the global average temperature of 0.Oct 18,  · The Trump administration is celebrating a drop in the nation's greenhouse gas emissions last year, even as the president himself continues to challenge the scientific understanding of .

Many chemical compounds present in Earth's atmosphere behave as 'greenhouse gases'. These are gases which allow direct sunlight (relative shortwave energy) to reach the Earth's surface unimpeded. As the shortwave energy (that in the visible and ultraviolet portion of the spectra) heats the surface.

Greenhouse gases

A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range. Greenhouse gases cause the greenhouse effect.

The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone. The greenhouse effect occurs when Earth's atmosphere traps solar radiation because of the presence of certain gases, which causes temperatures to rise.

Greenhouse effect, a warming of Earth’s surface and troposphere (the lowest layer of the atmosphere) caused by the presence of water vapour, carbon dioxide, methane, and certain other gases in the those gases, known as greenhouse gases, water vapour has the largest effect.

Learn about key greenhouse gases and their sources, as well greenhouse gas emissions at the global, national, facility,and household level.

Greenhouse Gases | Monitoring References | National Centers for Environmental Information (NCEI)