Credit: European Cycling Federation.

Earth Day is Saturday and Metro is helping everybody be ultra-friendly to Mama Earth by offering free bike share rides in downtown Los Angeles. Biking is pretty much a zero-emission activity (see above) and is a staple of lists of easy things you can do to help the environment and help fight climate change.

To get a free ride: enter the code 42217 at the payment kiosk. The freebie is good for a 30-minute ride. You will need to have a credit card to use as a deposit.

There are 61 stations around DTLA. That includes a station next to the Gold Line’s Chinatown Station — which is a very short stroll or pedal to the new Los Angeles State Historic Park that is reopening on Saturday. Those headed to the March for Science, which begins at Pershing Square, will also find plenty of Bike Share stations in the central part of downtown.

Below is a station map. Click on it to visit an interactive version that allows you to zoom in and plan your ride. Downtown has a variety of bike lanes and protected bike lanes — here’s an interactive map on the LADOT website.