Editing Rotterdam (section)

==== Green activities ====
Since 28 May 1994, Rotterdam has had the phenomenon [[wiktionary:opzoomeren|''Opzoomeren'']]. 15% of Rotterdam residents (about 100,000 residents) say they participate in this phenomenon.<ref>Data Omnibus Survey 2016 of the Municipality of Rotterdam.</ref> At the end of 2020, the city has a record number of 2,503 Opzoomer streets,<ref>[https://www.opzoomermee.nl/over-opzoomeren/ A history of Opzoomeren] {{Webarchive|url=https://web.archive.org/web/20221122112948/https://www.opzoomermee.nl/over-opzoomeren/|date=22 November 2022}} (Dutch).</ref> which is mainly reflected in the construction of facade gardens.

[[File:Dakpark Rotterdam.jpg|thumb|right|Dakpark Rotterdam]]
The municipality of Rotterdam is encouraging the construction of [[green roof]]s. There is an attractive subsidy for roof owners and the city has now provided a number of municipal buildings with a green roof. As of 1 January 2020, the water storage capacity requirement has been increased to 30 liters of water storage capacity per square metre. This reduces the burden on the sewer system during heavy rainfall and reduces the risk of flooding on the street.<ref>{{Cite web |title=Groene daken |url=https://www.rotterdam.nl/wonen-leven/groene-daken/ |url-status=live |archive-url=https://web.archive.org/web/20170929231316/https://www.rotterdam.nl/wonen-leven/groene-daken/ |archive-date=29 September 2017 |access-date=18 May 2022}}</ref>
*The city's largest green roof is located on top of the [[Groothandelsgebouw]] next to Central Station.
*The ''Dakakker'' is the largest roof farm in Europe on top of the Schieblok.
*The ''Dakpark'' is an elongated, narrow park in the district [[Bospolder-Tussendijken]] in Rotterdam-West. It has been built at a height of about nine meters, is about 85 meters wide and extends for about a kilometer from Hudson Square to near Marconi Square.<ref>[https://web.archive.org/web/20161230161647/http://www.nederlandwordtanders.nl/projecten/dakpark-rotterdam/ Article about Dakpark on Nederlandwordtanders.nl]</ref>
*The municipality of Rotterdam will provide the flat roof of the conference and concert building [[De Doelen]] with greenery and water storage. The design for the roof was made by Kraijvanger Architects.<ref>Robert Muis (ed.). De Doelen Rotterdam will have a green roof with water storage. On: [https://architectenweb.nl/nieuws/ artikel.aspx?ID=49365 Architectenweb] {{Webarchive|url=https://web.archive.org/web/20220517150110/https://architectenweb.nl/nieuws/|date=17 May 2022}}, 1 June 2021.</ref>