The fact is that earth has experienced global warming before. The earth went through global changes such as a long period of ice and long period of warmth. These were trigged naturally, by the sun and by how it’s light reached Earth’s surface.
However, since the 18th century, as we are powering our modern life, we are releasing heat-trapping gases called greenhouse gases which are staying in the atmosphere from a few years up to thousands of years, warming up our planet and ‘thickening up the Earth’s blanket.
Two of the biggest issues are the raising acidity of oceans and the melting of glaciers.
You can read my blog about Greenland through link in my bio.