They are the state's failure to overcome a water supply shortage, high taxes imposed by the state on property and development, poor rubbish collection, pollution and the spread of diseases such as dengue which Selangor tops.
"These are the five reasons we tell the rakyat (why Barisan should be voted to power in Selangor).
"We will tell them that we cannot solve these problems one by one, not unless we have political power," the Barisan chairman said when launching Selangor Barisan's general election machinery here Wednesday.
Also present were Barisan and Umno leaders, including MCA president Datuk Seri Liow Tiong Lai and MIC president Datuk Seri Dr S. Subramaniam.
Najib said voters should realise that development in the Klang Valley could become more effective and integrated if both Selangor and the Federal Territory of Kuala Lumpur were under the administration of Barisan Nasional.
Najib, who is also Umno president, advised all party members in Selangor to be united and not to squabble among themselves as disunity was one of the reasons why they failed to wrest the state in the last general election.
Earlier, the Prime Minister officiated new buildings for the SJK(C) Rasa in Hulu Selangor.
The new buildings which cost RM5.4mil was partly funded by a Government allocation of RM3mil.
Najib had earlier announced the RM3mil allocation for the school on April 28, 2010, which was three days after the Hulu Selangor by-election that was won by Datuk P. Kamalanathan.
"I'm visiting this school today to show that the promise made by the Barisan Nasional Government has been implemented.
"This also shows that the Barisan Nasional Government respects the existence of Chinese schools in our education system," said Najib.
The Prime Minister also approved an allocation of RM400,000 to upgrade the road and traffic light section at the Rasa intersection in Hulu Selangor.