IAS (Admin.) IAS Mains GS Paper 3 (Science-Tech, Economy, Environment, & Disaster Management) Environmental Issues-Environmental Pollution and Degradation Study Material (Page 4 of 15)

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Environmental Hazards and Remedial Measures: Greenhouse Effect

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Greenhouse Effect

Greenhouse Effect and Global Warming

Emission and radiation from greenhouse gases take place within thermal infrared range causing greenhouse effect. Joseph Fourier in 1824 first discovered greenhouse effect. John Tyndall in 1858, first reliably experimented on it and Svante Arrhenius in 1896, first reported it quantitatively.

Greenhouse Mechanism

Absorption and reemission of thermal radiation by greenhou…

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Environmental Hazards and Remedial Measures: Global Warming

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Global Warming

It is increase in the average temperature of earth՚s near-surface air and oceans since mid-20th century and its projected continuation. In last 100 years, temperature has increased 0.5 - 0.7 gaining further momentum in the recent years.

Global-Warming Potential (GWP)

It is a relative measure of heat being trapped by GHGs in atmosphere. It compares total heat trapped by a certain mass of gas to total amount of heat trapped by a similar mass of . GWP is calculated over a specific time interval like 20,100, or 500 years and is expressed as factor of (whose GWP is standardized to 1) . For example, 20-year GW…

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