Before revision: Water supply, deforestation 300x300px|Berlin 1885 – even Schöneberg was far from the centre back then As van der Borght implies, a further significant reason for the conclusion of the Permanent Forestry Contract lay in the need to ensure the water supply for the rapidly growing population of Berlin (a fourfold increase between 1871 and 1910 from around 900,000 to over 3,700,000).
After revision: the Proclamation of the German Empire inWater supply, deforestation 300x300px|Berlin 1885 – even Schöneberg was far from the centre back then As van der Borght implies, a further significant reason for the conclusion of the Permanent Forestry Contract lay in the need to ensure the water supply for the rapidly growing population of Berlin (a fourfold increase between 1871 and 1910 from around 900,000 to over 3,700,000).