there is ample evidence that earth's average temperature has increased in the past 100 years and the decline of mid- and high-latitude glaciers is a major piece of evidence.
there is ample evidence that earth's average temperature has increased in the past 100 years and the decline of mid- and high-latitude glaciers is a major piece of evidence.
ice age:0
an ice age is a long period of reduction in the temperature of the earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers.