During the 1970s, as San Francisco became a popular and economically successful city, job seekers came seeking homes; Justin Herman, the Executive Director of the San Francisco Redevelopment Agency criticized the presence of SROs, saying "This land is too valuable to permit poor people to park on it". By 1980, the hotel and convention industries were lobbying for the building of new hotels for tourists; tenant activists protested what they viewed as the "Manhattanization" of the city, including the gentrification and impacts on traffic and air cleanliness. From 1975 to 2000, landlords eliminated about 6,085 SRO units. From 1989 to 2002, more than 1,700 SRO units were destroyed by fires. Even in the 2000s, immigrants live three or four tenants per SRO room.