For those who can read in Polish -
another source in a short version :
google translation of the above link contents :
Loss of national wealth - 38% of the pre-1939 (the damage done in the industrial centers and urban centers).
Material damage of immovable property - residential buildings (162 190), rural farms (353 876), factories and factory complexes (14, 000), shops, private and public (199 751), workshops (84 436), 968 223 households [3 ].
The destruction of urban centers and cities -Warsaw War Losses
85% of a city of Warsaw ,
90% of Warsaw industry,
72% of Warsaw housing,
90% of Warsaw national treasures and monuments,700 000 deaths of inhabitants of Warsaw just one city (representing a total loss of the war in the people of Great Britain and the United States counted together )
The total destruction and theft of the Warsaw Ghetto in 1943, 95% of the losses. ,
The city of Jasło destructed in totall(96%),
and the destruction of the port of Gdynia.
Plunder of cultural property - a total of 43%.
Destroyed 25 museums,
Losses due to the irreversible destruction of museum collections, archives and library - impossible to accurately estimate the losses alone amounted
library about 66%.
Irreversibly destroyed 22 million books total,
the German Nazis in occupied Poland made the robbery about 516 000  of individual works of art, worth an estimated $ 11.14 billion (at the rate of 2001)
. As a result of the post-war restitution managed to recover only a small percentage of lost historical collections, works of art and exhibits. 
Losses in the Polish school - destroyed 17 universities, 271 schools, 4,880 primary schools, and 768 other schools.
In addition, the destruction of research institutes, scientific societies, and foundations of different types.
Loss of health care (hospital property, infrastructure, buildings) - 55% of the state before 1939.
352 hospitals were destroyed,
29 tuberculosis sanatoriums,
24 medicinal plants wafer,
47 social insurance company facilities,
778 health centers and clinics,
1,450 surgeries and dental .
The losses in the industry (both intentional destruction and looting of machinery and equipment) -
64.5% of the chemical industry,
The losses in forestry as a result of over-exploitation of the economy - cut 75 million cubic meters of merchantable timber, which corresponds to 400 000 hectares of forest.
Losses in agriculture and livestock - 1908 thousand. horses, 3,905 thousand. cattle, 4,988 thousand. pigs, 755 thousand. sheep .
The destruction of more than 50% of the railway infrastructure, road, air and maritime transport, telecommunications infrastructure
(destroyed 13 stations broadcasting
Radiotelegraphy 7 stations, seized radio 867 000 ).
Stolen or destroyed 2,465 locomotives,
83 636 wagons,
25 seagoing vessels and 39 vessels off the port.
Destroyed 5948 km railway track,
47 767 meters of railway bridges and viaducts,
14 900 km of hard-surface roads,
15 500 meters of road bridges 
No blanket statements.
Can`t you read the contents of those links I gave you ?
These are expertises done by many committee established after the war . There was a Compensation Office for War Reparations established . Their works were carried out by many years . There are also recent expertises prepared for the government after 1989 and after 2000 too.
That`s just an example of losses in the cities which were destroyed the most . In reality there was no Polish city which did not suffer war damges . Maybe only small or remote villages were left undestroyed .
one German bombing raid over Warsaw . This is a smoke from burning buildings not clouds :
And prewar Warsaw
City that came back from the dead
Calling Germans (whole nation- really?) or any other nation biggest thieves (or other negative thing) won't be something I will accept.
What do Germans say about Poles - the whole nation I also will not accept , my dear .
In colour pictures :
2.13 the Warsaw castle square
4.01 Nowy Świat street