Definition
Changes in the Earth's weather, including changes in temperature, wind patterns, and rainfall, especially the increase in the temperature of the Earth's atmosphere that is caused by the increase of particular gases, especially carbon dioxide.
Weather
The condition of the atmosphere at a particular place and time, such as the temperature, and if there is wind, rain, sun, etc.
Rainfall
The total amount of rain that falls in a particular area in a particular amount of time.