A group of major institutional investors has written to the prime minister urging the G20 to support a strong green element in programmes of fiscal stimulus.
Aviva chief executive Paul Abberley was one of the 10 senior executives who signed the letter along with Environment Agency head of pension fund management Howard Pearce and London Pensions Fund Authority chief executive Mike Taylor.
Abberley said: "Green investment isn't only for governments. Many private investors also want the opportunity to invest in green projects such as low-carbon energy and energy efficiency. This requires the right kind of policies and appropriate financial instruments.
"We are keen to keep talking to governments about how private sector investment can be mobilised to help make the recovery from this economic crisis a sustainable one."
UKSIF chief executive Penny Shepherd said: "The stimulus packages now being considered by several governments will be all the more powerful if they lever in private investment from responsible investors seeking long-term sustainable returns.
"This requires some detailed work to design frameworks and financial instruments that encourage investors to participate. Governments need to keep engaging in debate with investors so that the private sector's potential can be fully harnessed."
UKSIF has also teamed with sister organisations around the world to demand green action from the G20 meeting.
In a statement - Transforming Global Capital Markets - the group of six organisations said the current economic crisis "affords a unique opportunity" to move towards a low-carbon, resource efficient and socially sustainable economy.
The measures put forward include financial instruments and incentives to building the green economy using private investment alongside direct government support and for financial reform measures to require greater transparency and facilitate responsible ownership.
The statement also called on world leaders to respond to the challenge of the current economic crisis by incorporating sustainability and social responsibility measures into the economic stimulus packages for short-term recovery as well as the longer-term reform of the credit and investment markets.
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Malcolm Mclean says getting the channels of communication right and engaging more openly is a good starting point