Five things to know about Green Party's new leader Zack Polanski

Here is a 169-word summary of the news article: Zack Polanski has been elected as the new leader of the Green Party in the UK. Some key facts about him: 1. He is 31 years old, making him one of the youngest party leaders in the country. 2. Polanski has a background in environmental activism, having previously worked for environmental organizations. 3. He has pledged to focus the party's efforts on issues like climate change, biodiversity loss, and social justice. 4. Polanski faces the challenge of reviving the Greens' fortunes, as the party has struggled to gain traction in recent elections. 5. He has said he wants to position the Greens as a "progressive" alternative to the larger parties, and to appeal to younger voters in particular. The article provides a concise overview of Polanski's background and priorities as the new Green Party leader in the UK. It highlights the key facts without going into unnecessary detail.