Among the big tankers.

Oil often spilled by tankers also adds to water pollution.

And that those oil tankers needed to be decommissioned, and 2004 was going to be the pinnacle.

liquid natural gas tankers to decentralized resources that are environmentally more friendly, a lot more efficient and capable and safe from disruption.

They were talking about Exxon Valdez, and that there was going to be a glut of oil tankers because of the insurance industries.

Because when tankers carry oil they have to have ballast at some point, so when they're empty, they have the ballast water in there.

My journey began in 1971 when I witnessed two oil tankers collide beneath the Golden Gate, and a half a million gallons of oil spilled into the bay.

When one of these tar sands tankers, carrying the dirtiest oil, 10 times as much as the Exxon Valdez, eventually hits a rock and goes down, we're going to have one of the worst ecological disasters this planet has ever seen.

Some of the greatest densities of, some of the most iconic and threatened species on the planet, and yet there's a proposal, of course, to build a pipeline to take huge tankers, 10 times the size of the Exxon Valdez, through some of the most difficult to navigate waters in the world, where only just a few years ago, a B.C. ferry ran aground.