greenhouse+effect

media type="custom" key="4948751" The **greenhouse effect** is the heating of the surface of a planet or moon due to the presence of an [|atmosphere] containing gases that absorb and emit [|infrared radiation].[|[1]] Thus, greenhouse gases trap heat within the surface-troposphere system.[|[2]] This mechanism is fundamentally different from that of an actual [|greenhouse], which works by isolating warm air inside the structure so that heat is not lost by [|convection]. The greenhouse effect was discovered by [|Joseph Fourier] in 1824, first reliably experimented on by [|John Tyndall] in 1858, and first reported quantitatively by [|Svante Arrhenius] in 1896.[|[3]] In the absence of the greenhouse effect and an atmosphere, the [|Earth's] average surface temperature[|[4]] of 14 °C (57 °F) could be as low as −18 °C (−0.4 °F), the [|black body] temperature of the Earth.[|[5]][|[6]][|[7]] [|Global warming], a recent warming of the Earth's surface and lower atmosphere,[|[8]] is believed to be the result of an "enhanced greenhouse effect" mostly (more than 50%) due to human-produced increases in atmospheric [|greenhouse gases].[|[9]] This human induced part is referred to as anthropogenic global warming (AGW). []

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