Meteorologists studying the change in a region's precipitation over a 20-year period are studying the region's

Climate

Climate is a term used to the weather conditions prevailing in an area for longer period of time. Its a record of the weather conditions of that area. Generally, its the record of many years. A particular area has its own specific climatic conditions. Factors being studied are temperature, humidity, precipitation, pressure of the atmosphere, wind speed.

The term weather is used when these factors are studied for a shorter period of time. This is how its different from climate.

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)