how greenhouse gases store infrared energy?

Question

CO2, methane & other greenhouse gases are said to be greenhouse-effect-inducing gases. How do they retain heat? Does the bonding angle change when being stroke by infrared?

Our 3 answerers did not answer the main point of my question, maybe my question was indirect.

let see,oxygen isn't perfect in absorbing infrared. Yet, CO2 is. So, what is the anatomy of CO2 that it can oscillate with infrared? Does CO2 molecule tilt its bonding angle when being hit by infrared and hardly reach back to its equilibrium (is this why it can store extra energy in its bond?)?

Before any detail is told, i would like to say out my opinion. Human-based global warming is skeptical. Why? Infrared is neither being reflected nor being retained in the atmosphere in fact. In = out. why?when an infrared hits a molecule,the molecule will emit the energy of infrared in all direction to reach equilibrium, IN ALL DIRECTION.Energy will find its way out to the outer space through radiation.

There is no such human-accused global warming,only nature possesses the power to made this cataclysm like sun.

This is my thinking,but i'm not a scientist,i need to hear from [e-mail]

Answer 1

People seem to not understand how a greenhouse actually works. A green house does not 'trap' radiant heat; the radiant energy can escape the same way it came in: through the transparent glass.
A green house traps convective heat energy. Some of the radiant energy warms the surfaces of objects inside the greenhouse. This energy causes a temperature rise in the object, and some of the radiant heat reflects back outside. The air in contact with the object heats, becomes lighter, and floats to the top of the greenhouse. Since the air cannot escape to the atmosphere, the air temperature inside the greenhouse increases.
The earth's atmosphere is not a 'greenhouse'. This is a false analogy. CO2 no more traps radiant heat than window glass does.

Answer 2

Basically those gases form a green house effect. Think of how greenhouses, which are made of glass, allow light/heat to come in but not out thereby increasing internal temperatures in the greenhouse. You can think of green house gases as a piece of glass/shield in the atmosphere that act in the same way as a greenhouse in increasing temperatures on earth.
The basis of this effect is radiation at different energies. Radiation coming from the sun enters our atmosphere and then down to earth, where it hits different surfaces and is reflected. Radiation loses energy after hitting surfaces and therefore the reflected radiation may not have enough energy to leave earth atmosphere because it is trapped by the greenhouse gases.

Answer 3

Light strikes the earth and warms surfaces. This heat would normally radiate back out into space.
The gasses do not let the heat radiate back out into space. Instead they trap the heat.