1-It is known that all cooling solid material losts their volumes (gains density).Meantime we all know that Earth's outer circle length is about 40 000 km. today,but relatively can imagine that it was more larger before forming outer crust.(billions of years ago).So,we can understand that the Earth is getting smaller in every year,decade and century.

2-Another shrinking indications are "earthquakes".This is a fact what I have observed in many serious evidences after the devastating last earthquake experianced in august 1999 in Turkey.Many land-falls has been formed in different sectionsof earthquake zone.One of them was in seafront,a large slab of landmass sunk down more than 5 mt. underwater,huge building submerged up to 3 th floor. In addition to above facts,I have been observed many similar formings along the Turkey's 12 000 km coastal section during my former turistic visits.Many land pieces and ancient establishments were underwater,but I did not pay such an evaluation at that time.

Yes! earth is getting shrinking first due to cooling effect,and falling the outer crust down to emptied spaces that are formed by melted or ashed material and gases exhausted from vents (volcaneo).
I hope that above reasons are merely logic to understand the matter. If so!...

3-We know that 3/4 of earth is water.As this percentage never be lessening,then the result shall be
indispensibly submerging.Another fact is no way to reduce the water amount,eventhough you
inject it to inner sections,will return back as vapour,geyser or mineral water to you.

Finally!
4-Only solution seems to be using this endless material as an energy resource in place of all known others.