Trucost has worked for many leading organisations over the last few years, including Avis, DHL, the Environment Agency, Hermes Investment Management, J.P.Morgan, Land Securities, Legal & General, Merrill Lynch Investment Managers, National Grid Transco, Prudential and Royal Mail. Below is a selection of quotes from companies that we have worked with.

Nick Robins, Head of SRI Funds, Henderson Global Investors - re. How Green is My Portfolio?:

"[Trucost's] detailed company-by-company analysis of the fund's holdings helps to show how investment choices between alternative stock ideas can affect the fund's carbon performance."

David Pitt-Watson, Chief Executive, Hermes Focus Asset Management Ltd

"Trucost's ability to dig out the data about the environmental consequences of production is absolutely second to none anywhere in the globe."

Colin Melvin, Head of Corporate Governance, Hermes Investment Managers

"Hermes has been a long standing advocate of good corporate governance and believes that active engagement with companies creates long-term value. We have a legitimate interest in the management of environmental risk of the companies in which we invest and Trucost gives us the basis for effective engagement on these issues."

Jane Ambachtsheer, Mercer Investment Consulting:

"The interest being shown in Trucost's research helps to show the speed at which the climate change debate is moving."

Ronnie Lim, Head of Socially Responsible Investment Strategy, Morley Fund Management

"The kind of numbers that Trucost provides could help alert mainstream fund managers to the importance of environmental issues for shareholder value. This approach could help firms like mine, which have been assessing environmental performance for years, to focus more on shareholder value rather than qualitative judgments about companies."

Rt Hon Michael Meacher MP, Former Minister for the Environment

"I think Trucost is ... one very good way by which one can actually calculate the overall, wider impact ... of company activities, and I would strongly commend it. Trucost ... is an excellent system. This (system) can give companies and investors a real indication of just how sustainable a business is."

Rosemary Radcliffe CBE, Chairman, OFR Independent Working Group

"Trucost has a well established and robust process which can help boards of directors decide which of their businesses' environmental impacts should be disclosed."

Raj Thamotheram, Director of Responsible Investments at AXA Investment Managers Ltd:

“The Trucost study is one of the best indicators we have of the growing interest amongst clients and their agents to gauge carbon intensity levels.”

Mark Fairbrass, Chairman, Beacon Press

"I think Trucost will become more powerful than ISO 14001 and EMAS because it measures all suppliers using the same economic principles and can be applied to any sector. Nothing else in the marketplace can do this. So many companies state that they are environmentally conscious, but cannot prove it. Trucost is one of the few systems that can justify these claims because it uses existing financial data and statistics to calculate total environmental performance. It provides us with a fair comparison and benchmark of our performance against our competitors. We aim to use Trucost to measure our supply chain and exert more pressure on companies in our industry to measure and report environmental performance. We also aim to use Trucost to a marketing advantage, and tell potential customers how the company compares against the industry average."

Derek Hall, Environment Manager, Bovince

"By using Trucost we continue to be fully-prepared for future legislation."

Douglas Stewart, CEO, Green Energy

"We looked at different tools to get a full picture of our environmental performance and only Trucost can measure and communicate our environmental performance to customers, investors and the boardroom. In our case you could say that Trucost plays the role of environment manager."

Dave Farebrother, Energy and Environment Manager, Land Securities

"Measuring our environmental performance, whilst always important to the company, is now a crucial part of our business activity. We want to account for our total environmental impact and Trucost is the first system to enable us to do that. We are hoping that it will help us to demonstrate our commitment to sustainable business to both existing and prospective tenants, and benchmark our performance over time. We also want to use Trucost as a supply chain management tool."

Charles Tucker, Head of Environment, Royal Mail Group

"Anything to do with the environment is to do with transparency. Consignia [Royal Mail Group] had failed to grasp the enormity of the issue until recently, despite running one of the UK's largest fleets ... and the process [Trucost Membership] had allowed the company to create a clear audit trail in measuring its environmental impact."

Andrew Troup, Executive Director, RPS

"There are certain principles applied by Trucost in its rating system that RPS believe have broad application and benefit in helping business understand environmental performance. RPS for its part as a FTSE 250 plc and Europe's largest environmental consultancy, is keen to explore such mechanisms that may be helpful both for its own business and that of its clients."