The Co-operative Group is among the world's leading businesses when assessed on its response to global climate change, an integral part of its approach to sustainability, and has reduced operational CO2 emissions by 86%. Green electricity covers 98% of its electricity supply – 680 GWh/year. In addition, the Co-operative Bank's Ethical Policy states that "we will not invest in any business whose core activity contributes to climate change through the extraction or production of fossil fuels". It offers a green mortgage package, encourages customers to lobby for reducing CO2 and is investing £1.5 million in solar panels for schools at no cost to the school. To promote awareness internally of climate change, it has hired a cinema for staff to see “An Inconvenient Truth” by Al Gore.