In 2007, the Intergovernmental Panel on Climate Change (IPCC) affirmed that warming of the climate system is unequivocal, with effects such as increasing land and ocean temperatures, rising global average sea level, and reduced snow and ice already being observed. These changes—which are linked directly to human activities producing greenhouse gases—are already causing changes in ecosystems, water supply and availability, and patterns of extreme events, with (in many but not all cases) consequent damages to human health, buildings, livelihoods, and infrastructure. The question is no longer, “Is there human-caused climate change?” but “What can be done to react and adapt to it?” Adaptation does not preclude steps to reduce greenhouse gas emissions, but recognizes that we are unavoidably committed to some amount of climate change, and that changes are already occurring.
The business community has for some time been aware of the risks and opportunities associated with greenhouse gas mitigation and current and future climate change policies. Many businesses have taken steps to reduce greenhouse gas emissions voluntarily. Many are taking into account some of the impacts of climate change —potential state and federal regulations, shareholder perceptions, and changes in consumer and supplier markets, for example—on the cost of doing business now and in the future. Fewer businesses, however, are incorporating the risks and opportunities associated with the physical effects of climate change in their business planning.
As trends in climate become clearer and the uncertainty surrounding future changes is reduced, more businesses will want to consider whether to adapt to projected changes by taking action now. This, in turn, involves reacting to and managing risks as well as taking advantage of opportunities.
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