The planet we live on has a far from ideal geometric shape, and its rotation around an imaginary axis occurs with an error. NASA analyzed information for the past century and compiled a model of the deviation of the earth's axis - it reaches 10 cm per year and therefore can be already 10 m compared to the position at the beginning of the 20th century. So far, this does not pose a danger, only scientific interest, since what is happening is proof of the global consequences of human activity.
If we imagine the Earth as a ball strung on an axis, then its rotation will depend on how evenly the substance is distributed inside. In reality, there is no balance at all - lithospheric plates are moving, glaciers are melting, the so-called "glacial rebound" is forming, etc. Different sides of the planet outweigh, which causes the axis to shift from the conventionally ideal position. Scientists call the consequences of the rapid degradation of glaciers the most fleeting and therefore important factors of influence on this.
It is estimated that over the 20th century, 7, 500 gigatons of water have flowed from the ice fields of Greenland into the ocean - a colossal weight has moved. And the island is also located approximately at an angle of 45 degrees to the axis of rotation of the planet, and the overload at this point has the greatest effect. Further, when the heavy mass of ice melted, the ground pressed down by it moved upward, freeing itself from captivity - this is the “glacial rebound”. And the movement of such a scale also made the earth's axis wobble.
And what does the man have to do with it? The fact is that the anthropogenic factor has played a decisive role in global warming in recent decades. We, through our action and much more inaction, provoked a rise in temperature, pollution of the atmosphere and melting of glaciers. And, as a result, they had a hand in displacing the axis of rotation of the Earth. Now we need to better understand these complex processes and prevent such global changes in the future.