How many degrees did the globe warm in the 20th century? Why is this amount considered significant?


Global warming during the 20th century measures 0.6°C (about 1°F). This is significant compared to temperature changes over thousands of years because global temperatures have not varied by more than 2°C during the past 10,000 years.

Environmental & Atmospheric Sciences

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What was the largest city north of Mexico?

Environmental & Atmospheric Sciences

The moving of currents results in the mixing of cooler and warmer waters

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

The Earths system that includes the oceans, rivers, lakes, and glaciers of the world is called the ______.

What will be an ideal response?

Environmental & Atmospheric Sciences

Which of the following elements is named for a country?

A) Fr B) Ge C) Po D) all of them

Environmental & Atmospheric Sciences