Sam Judd looks at the effect of plastic and toxins on marine life - particularly killer whales.

As valuable to marine life as it is prized by humans, the Hauraki Gulf is in decline. Though solutions seem as elusive as the gulf's fish stocks, a groundswell is building for collaboration.

Air pollution from motor vehicles will kill about 255 Kiwis this year - and while we've got emissions standards, there's no serious testing regime in place.

It was a shark attack that started it all. The 3m tiger shark ripped into one of Sam Judd's legs during a surfing trip to the Galapagos Islands in 2007.