How is excessive content of `CO_(2)` responsible for global warming?

Explanation

`CO_(2)` is produced during combustion. It is utilized by plants during photosynthesis and `O_(2)` is released into the atmosphere. As a result of this `CO_(2)` cycle, a constant percentage of `21% O_(2)` is maintained in the atmosphere. As a result of this `CO_(2)` cycle, a constant percentage of `21% O_(2)` is maintained in the atmosphere. However, if the concentration of `CO_(2)` increases beyond `0.03%` by volume in the atmosphere due to excessive combusion, some of the `CO_(2)` will always remain unutilized. This excess `CO_(2)` absorb heat radiated by the earth and other bodies present on the earth. As a result , temperature of the earth and other bodies on the earth increases. This is called greenhouse effet and `CO_(2)` is called a greenhouse gas.
As a result of greenhouse effect, global warming occurs which has serious consequences.