The document discusses two policy solutions to increase physical activity in Los Angeles by improving access to parks and recreation facilities. The first solution is to prioritize funding to restore the southern portion of the Los Angeles River, creating green space and trails for underserved communities. The second solution is to reform the city's Quimby ordinance to increase the service radius for park fees, incentivize land donations from developers, and increase the value of fees and credits to acquire more park land in park-poor areas. Both solutions aim to address the inequitable distribution of green space and reduce physical inactivity, which are public health problems in Los Angeles.