But the guidelines, which are overseen by the World Business Council for Sustainable Development and World Resources Institute, define the three main categories of emissions companies should report broadly, leaving plenty of room for interpretation.
That makes comparisons problematic. An unrealistically low lifetime figure could make cars appear less polluting than they really are, SCA Executive Chairman David Lubin said. "We now believe it's better to disclose the lifetime distance assumptions by region in our next disclosure ."Experts said Scope 3 emissions were the hardest of the three areas to assess as companies have to rely on data from customers and suppliers for their calculations.
Only big investors have deep enough pockets to pay for such data and employ teams to assess it, leaving smaller investors at a disadvantage, experts say.carbon disclosures mandatory for about 50,000 companies operating in the bloc from next year while new U.S. rules should come this year as governments look to replace a patchwork of private sector norms with binding rules, making it easier to crack down on greenwashing or exaggerated climate-friendly claims by companies.
The GHGP allows companies to buy green energy to offset their emissions, using contractual instruments such as renewable energy certificates, and reflect this in their reporting.
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