the global dimming trend reversed around 1990 - 15 years after the global warming trend began in the mid 1970's.
the global dimming trend reversed around 1990 - 15 years after the global warming trend began in the mid 1970's.
global warming:83
from 1961 to 1990, a gradual reduction in the amount of sunlight reaching the earth's surface was observed, a phenomenon popularly known as global dimming, typically attributed to aerosols from biofuel and fossil fuel burning.