Exxon Mobil is set to disclose the impact of carbon regulations on its investments, such as mining oil sands in Alberta, Canada. Exxon Mobil Corp. has agreed to disclose how the regulation of carbon emissions could affect the value of its oil and gas holdings, a sign that America’s biggest energy company is stepping up efforts to address shareholders’ environmental concerns. The oil giant will publish a report later this month explaining how it weighs the risks that regulations could make it prohibitively expensive to tap oil and gas, according to Arjuna Capital, an investment management firm focused on social responsibility that submitted a shareholder resolution asking for such a report. Exxon is set to disclose a range of measures in the report, including a calculation of the carbon emissions that its operations give off and a discussion of how it incorporates the risk of regulation into its spending […]