Thousands of miles by train, coach, bus, boat and foot and, at the last hurdle, Ewan finds that there's no way to cross the Tasman Sea except on metal wings...
… supporting a company that captures landfill methane emissions - a niche but vital public …
It has no synthetic alternative and some scientists believe supplies may already be in a terminal decline. But there is still no international effort to tackle the massive agricultural problems that will come when the phosphorus runs out
… council about to waste your waste? Biogas - a methane-rich fuel made from rotting food waste …