Respuesta :

Answer:

the global average surface temperature has increased over the 20th century by about 0.6 degrees C

In the last thousand years, solar activities have caused a decrease in temperature in the northern hemisphere.

We can arrive at this answer because:

  • The changes in the sun were very important for the rise in temperatures during the 1000's to the 1100's.
  • However, over the years this activity and changes in solar production caused this temperature to drop, especially in the northern hemisphere.
  • Even though this decrease in temperature was something small and subtle, in the last thousand years it has been established in the region above the equator.

This process explains how global warming was not the result of changes in solar production, as this change caused a cooling. In this case, this confirms that global warming was caused by the accumulation of greenhouse gases caused by human actions.

More information:

https://brainly.com/question/3553382?referrer=searchResults

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