The document discusses the need for contingency planning in the building sector to prepare for rapid reductions in greenhouse gas emissions that may be required in response to major climate change-related disasters. It suggests developing a variety of contingency plans now by governments and organizations to reduce emissions by 75% over 5 years to have options ready for implementation. Example proposals included introducing carbon taxes, banning new coal plants, retrofitting buildings for energy efficiency, and establishing job training programs to support upgrades. Having contingency plans prepared could lead to more rational responses compared to unprepared reaction in a crisis situation.