Ding-ding, it's the officialWorld Car Free daytoday, and there are many ways you can show your support for green transportation this weekend, and have fun while doing so.

Today, it looks like Queen West will be the epicentre of fun, withparking meter partiesall afternoon and a Carfree Parade starting at 6 p.m. at Trinity Bellwoods Park.

Tomorrow,Toronto Environmental AllianceandDavid Suzuki Foundationwill be taking aSmog Hike. Starting at the Harbour Square Park at noon, the group will move north along Yonge, posting 1700 unique anti-smog messages on 1700 lamp posts. One for each of 1700 smog-related deaths that happen in Toronto each year on average. Even if you can't join the hike, you can contribute to the cause by sending a short anti-smog message to the organizers, who will hand-write it on your choice of poster (silhouettes 1-8 above) and post it on your behalf.

Working in collaboration with the Smog Hikers, Bikes on Bloor is organizingBells on Bloor, a ride starting at noon at High Park's main gate and finishing at the ROM at 1 p.m. Come along and ring your bell all the way for cleaner air and more bike lanes (if you don't have a bell, that's your chance to get a free one)! You are encouraged to join the Smog Hikers afterwards who are expected to be somewhere nearby around then.

Image byToronto Environmental Allianceused in collage.