The document discusses climate change policies in California and San Diego County that involve intergovernmental cooperation between federal, state, and local governments. Specifically, it mentions that by 2030 California aims to reduce greenhouse gas emissions by 40% below 1990 levels according to the state's climate action plan. Additionally, San Diego County approved a climate action plan in 2018 to lower emissions over 30 years. Currently, these climate policies at various government levels are being implemented and updated collaboratively to combat the impacts of the climate crisis, such as extreme heat and wildfires, at each jurisdiction.