Posts Tagged: "human activity"

What Causes Global Warming

What Causes Global Warming?

- - 0 Comments

Some of the natural changes in Europe’s climate over the past 1,000 years, including the deadly, cold winters of the 16th and 18th centuries, can be actually explained by variations in sun’s activity. According to the Earth scientists, the solar output drops correlate with the cool-down periods in the North...