He added that the cost of installing video surveillance comes up to 1 per cent of total construction project cost on average, with one set of CCTV costing about S$5,000. Depending on the size of the project, up to four such CCTV sets may be required, Mr Tan said.
From April 2014 to March this year, NEA disbursed a total of S$8.3 million in grants to incentivise contractors to adopt quieter construction equipment and methods. These include using quieter piling and hacking equipment, and installing noise barriers and enclosures.
Amendments were also made to the Environmental Protection and Management Act to help reduce greenhouse gas emissions.
From October next year, air-conditioner and refrigerator models that use refrigerants with high global warming potential (GWP) will be phased out.
GWP refers to a measure of the warming effect of a gas relative to the warming effect of an equivalent amount of carbon dioxide, usually over a 100-year period.
NEA will start with prohibiting the supply of household air-conditioners that use refrigerants with GWP of more than 750, and household refrigerators and commercial water-cooled chillers that use refrigerants with GWP of more than 15.
This is because climate-friendly alternatives are already available in Singapore, said NEA.
To minimise HFC emissions from improper handling and raise competencies, the country will regulate companies that carry out works that involve the use or handling of any greenhouse gases, such as the installation, maintenance and decommissioning of refrigeration and air conditioning equipment.
Companies will be required to establish and maintain policies, procedures and processes for the regulated greenhouse gas works, and ensure that they are carried out safely and in the prescribed manner.
Responding to a question from MP Louis Chua (WP-Sengkang) about the abatement potential of the new measures, Mr Tan said that they are expected to reduce hydrofluorocarbons emissions from the regulated equipment by around half by 2030.
He added that the Ministry of Sustainability and the Environment has initiated a review and is consulting key stakeholders on the plans for the Kigali Amendment, which aims to phase down the production and use of hydrofluorocarbons.
Meanwhile, Nominated MP Hoon Hian Teck asked whether it would be better to price, rather than to regulate, emissions from hydrofluorocarbons.
“Compliance costs may differ across industries and even across firms in the same industry. For example, newer firms might more readily take advantage of clean technology not available to older firms when the latter made their investment decisions,” said Prof Hoon.
“It might be preferable under uncertainty to set a tax on greenhouse gas emissions, and then allow firms to choose the extent to which they wish to control the amount of emissions, so it gives firms some buffer time to transit.”
While pricing remains “an option”, Mr Tan said regulations offer a much greater outcome certainty in abating emissions.
“Even if taxation were to be introduced, these considerations mean that regulations may still be needed. We would also have to consider the cost-effectiveness of the taxation regime, given the highly distributed sources of emissions,” Mr Tan added.
“While the tax can be levied upstream on importers, this has to be coupled with a system of downstream rebates for spent refrigerants that are recovered.” he said, adding that this could potentially result in higher administrative costs.