The Willamette River in downtown Portland was just one of thousands of locations worldwide where the climate awareness campaign known as "350 Day"
took center stage on Saturday.
" is the product of a published report by NASA climatologist James Hansen, which concludes that 350 parts per million is the maximum safe level of carbon dioxide in the earth's atmosphere.
Portland's most visible event was connected to the River of Action
initiative and consisted of more than 100 to canoes and kayaks linking together on the Willamette River to form a giant "350" out on the water just south of the Burnside Bridge.
Some more photos from the event: