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The UK General Election is fast approaching, top of the agenda are the political parties green ambitions and one particular initiative is garnering a lot of attention, tree planting. The Labour Party has the most ambitious target – a whopping two billion trees planted by 2040. How much land would this take, how does it stack up against other party pledges and what difference will it make? Presenter: Tim Harford Producer: Lizzy McNeill. (Photo: Bluebell woods in the Cotswalds, UK. Credit: Tim Graham/Getty images)
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