Some of these are: the National Communications (2003 and 2015); the National Adaptation Programme of Action (2007); Natural Gas Policy (2013); the Zanzibar Environmental Policy (2014); the Renewable Energy Strategy (2014); the Natural Gas Act (2015); the National Forestry Policy (1998); the National Transport Master Plan (2013); the National Environmental Policy (1997); the Zanzibar Environmental Policy (2013); the National Environmental Action Plan (2012 – 2017); the National REDD+ Strategy and Action Plan (2013) and the National Environment Management Act (2004). The Economics of Climate Change reports for Tanzania mainland and Zanzibar (2012) provide indicative costs of Business-as-Usual (BAU) and a good basis for estimating adaptation and mitigation costs required to enhance adaptive capacity and long term resilience in Tanzania.