EDMONTON - Eco-activist Wiebo Ludwig says he has been forgoing conventional treatment for esophogeal cancer in favour of alternative medicine.

Ludwig says the cancer is just above his stomach, but he won't know how far it has spread until he gets the results from tests done in Edmonton.

He says doctors are advising him to follow more conventional treatments, but he says surgery and radiation are too invasive and destructive for his taste.

The 69-year-old says he's been undergoing therapy that involves injections of vitamin C and hydrogen peroxide.

Ludwig was convicted in 2001 of bombing sour gas wells in Alberta and served about a year and a half in jail.

Ludwig has blamed oil developments near his family's property near Hythe, Alta. for livestock deaths as well as a miscarriages in his family.

He spoke to reporters Saturday at a screening in Edmonton of a documentary about him called "Wiebo's War."

He says he doesn't consider his decision to use alternative treatments as a risk, noting that he's "used to taking risks."

He says he hopes to live another 10 years because he says he's writing a book about what he considers to be the world's underlying problems.