The Sierra Club's political page – find out what's going on at the national level.
The Angeles Chapter political committee doesn't do much but identify when they meet.
Let's start with the City of Long Beach, City of Signal Hill, City of Lakewood, and City of Seal Beach sites. These are the communities served by the Long Beach group. These links are good starting points for contacting city officials and seeing what's on their agendas.
Now let's consider California State Government, which is divided into executive, legislative, and judicial branches. The legislative branch is further divided into the State Assembly and the State Senate. The Long Beach Group is served by the Assembly 54th district, and the State Senate's 27th district.
Now let's consider the Federal Government, which is also divided into executive, legislative, and judicial branches. The legislative branch is further divided into the House of Representatives and the Senate. The Long Beach Group is served by the Congressional 37th district, and both of California's Senators, Barbara Boxer and Dianne Feinstein.