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Which of the following is a greenhouse gas primarily responsible for global warming?
Nitrogen
Oxygen
Carbon Dioxide
Argon
Carbon Dioxide
Carbon dioxide (CO2тАЛ) is a primary greenhouse gas that traps infrared radiation within Earth's atmosphere. It acts as a thermal blanket, preventing heat from escaping back into space, which directly contributes to the global warming effect.
Carbon dioxide (CO2тАЛ) is a primary greenhouse gas that traps infrared radiation within Earth's atmosphere. It acts as a thermal blanket, preventing heat from escaping back into space, which directly contributes to the global warming effect.
Think of CO2тАЛ like the glass walls of a greenhouse: it lets sunlight in to warm the space but prevents the heat from escaping, keeping the interior significantly warmer than the outside air.
G-M-C-W: Greenhouse gases Main Cause Warming (Water vapor, Methane, Carbon dioxide, Water vapor).
CO2тАЛ+h╬╜тЖТCO2тИЧтАЛ тАФ represents the absorption of infrared energy leading to an excited state
E=hc╬╜ тАФ the energy associated with absorbed electromagnetic radiation
Greenhouse gases absorb long-wave infrared radiation emitted from the Earth's surface. When solar energy strikes the Earth, it is re-radiated as heat; CO2тАЛ molecules vibrate in response to this thermal energy and re-emit it in all directions, including back toward the surface. This physical process, known as the greenhouse effect, increases the average global temperature.
Carbon dioxide remains in the atmosphere for hundreds to thousands of years.
Human activities like burning fossil fuels (C+O2тАЛтЖТCO2тАЛ) are the primary drivers of increased CO2тАЛ concentrations.
Greenhouse effect is a natural process; enhanced greenhouse effect is caused by human activity.
Maintains Earth's temperature within a habitable range (without it, the average temp would be -18┬░C).
Excess levels lead to climate change, sea-level rise, and disrupted ecosystems.
Photosynthesis process in plants.
Carbonated beverages and fire extinguishers.
Global Warming Potential (GWP) of CO2тАЛ is defined as 1, serving as the baseline for all other gases.
Nitrogen (N2тАЛ) and Oxygen (O2тАЛ) are the most abundant gases in the atmosphere but do not absorb infrared radiation because they are homonuclear diatomic molecules.
Argon is an inert noble gas and does not contribute to the greenhouse effect.
C is correct тАФ Carbon dioxide is the principal anthropogenic greenhouse gas driving global climate change.
In exams, remember that Nitrogen and Oxygen make up 99% of the atmosphere but are transparent to infrared radiation; only molecules with dipole moments (like CO2тАЛ, CH4тАЛ, H2тАЛO) act as greenhouse gases.
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