What is global warming?
user
The temperature of the Earth is increasing gradually.
assistant
What causes the temperature of the Earth to increase gradually?
user
There are many things that cause the temperature to increase gradually.  One cause is greenhouse gasses in the atmosphere.  When these gasses trap heat and make it impossible for it to leave the atmosphere, the temperature of the Earth increases.
assistant
What is global warming?
user
The temperature of the Earth is increasing gradually.
assistant
What causes the temperature of the Earth to increase gradually?
user
Radiation coming from the sun heats up the Earth and water.
assistant
What is global warming?