"Let's try to make it mandatory," he said in reply to a question from K S Puttannaiah (Karnataka Rajya Raitha Sangha), who pointed that Coimbatore city in Tamil Nadu has done a good job in rain water harvesting, adding, Bangalore's water requirements would soar in the coming years.
To decongest Bangalore and check rapid migration of people, the Chief Minister agreed with the Speaker Kagodu Thimmappa that towns around the city such as Tumkur, Hoskote, Chikkaballapura and Ramanager needed to be developed.
Government would come out with a perspective plan for Bangalore, Siddaramaiah added.
Japan International Cooperation Agency has agreed to provide financial assistance to the Rs 4,300 crore project, which includes land acquisition and construction costs besides intelligent transport system.
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Responding to a question from S R Vishwanath (BJP), Siddarmaiah said farmers, from whom 1,810 acres had been acquired for the project, would be given an option of either financial compensation or sites.
Initially, the road width was planned to be 100 metres but it has been scaled down with proposal to have sites in the "cut-out" 25 metres stretch, he noted.
Siddaramaiah, replying to M P Appachuranjan (BJP) who wanted to know the steps taken by the government to allot sites to legislators who have not got them, said the Government has stopped allotment following the court order.
The High Court in its August 25, 2012 judgement, observed that the allotment of sites made under 'G' category by the BDA is illegal and without the Authority of law.