Career
He has been prominent in advocacy for organic farming, organic gardening and biosecurity in New Zealand. In the 1996 election, when the Green Party was part of the Alliance, Ewen-Street was the Alliance candidate for the Kaikoura electorate, where he came fourth in the candidate vote. His list ranking of 52 was far too low to enter Parliament as a list Member of Parliament. He was re-elected in the 2002 election.
Politics
He was a member of the Green Party and a Member of the New Zealand Parliament for the Greens from 1999 to 2005. He first entered Parliament as a list Member of Parliament in the 1999 election, having been ranked third on the newly independent Green Party"s party list. In June 2004, however, he announced that he would be retiring from politics at the next election, saying that the birth of his daughter meant that he wanted to spend more time at home.
In August 2006, Ewen-Street joined the National Party, saying his passion for the environment hasn"t changed, but he believes more progress can be made through a major party such as National.