The Construction Ministry plans to offer subsidies from fiscal 2001 to encourage owners of major buildings to plant trees and vegetation on rooftops and other parts of their premises to combat rising temperatures in city centers, ministry officials said.

The subsidies will be created through revisions to the Law for the Preservation of Urban Greenery, they said Saturday.

The revisions will be introduced in the next regular Diet session convening in January after the ministry is integrated into the Ministry of Land, Infrastructure and Transport in the government reorganization on Jan. 6.