Doima, a small town in the Colombian highlands, is on the front line of battle against a giant government-backed gold mine that would fill a nearby valley hundreds of metres deep in over a billion tonnes of mine waste. Hal Rhoades met Mariana Goméz Soto, an activist in Doima's campaign to defeat the mine project.
Daniel Raven-Ellison is a man with a big idea - making London the world's first 'National Park City' to safeguard, and promote the enjoyment of London's myriad natural treasures, writes Lucy Anna Scott. Is he bonkers? Probably. But with a growing band of backers getting behind his bold vision, who cares?
Is our inability to tackle climate change the fault of politicians? Corporations? Governments? Or is it because that's the way our brains have evolved, able to hold six contradictory ideas at once, and believe them all? Carol Linnitt met climate campaigner George Marshall, who thinks he is finally asking the right questions.
Hunter Lovins is on a mission, writes Sophie Morlin-Yron: to put the transformational technologies we already have to work for the benefit of people and business - and to re-create the economy so it's no longer a machine for polluting the planet and devouring natural resources, but a mechanism for building and sustaining natural and human capital.
Adam Weissman spills the beans on the Trans Pacific Partnership, which threatens to undermine democracy in the US and other countries at its roots. If passed it will represent a massive handover of power from nations to corporations - but as Mickey Z writes, there is still time to organize and defeat Obama's TTP campaign.
The essential first lesson for an animal rescuer: you are unimportant. It's the animals that matter. Sophie Morlin-Yron meets Jan Creamer - effective, courageous and seemingly selfless campaigner against animal cruelty worldwide, from Bolivia to Zambia, from circuses to factory farms.
Tatyana Novikova has been fighting an unsafe nuclear power plant right on the country's border with Lithuania. She spoke to Chris Garrard about her campaign, the official persecution of anti-nuclear activists, and her invocation of the Aarhus Convention to the anti-nuclear cause.
As composer Jonathan Dove prepares for the premiere of his 'Gaia Theory' at the BBC Proms this month, he explains to Laurence Rose how his recent work has been inspired by a wake-up call - right from the very top of the world.
Repowering London is an energising force - not just making renewable energy projects happen, but engaging communities to finance them, training young people to install them, and ensuring the benefits stay local. Lucy Anna Scott meets the dynamic Agamemnon Otero ...
As the World Cup gets under way in Brazil, Yanomami shaman Davi Kopenawa told Liam J Shaughnessy about the very different world he inhabits, deep in the Amazon rainforest - a world of bright spirits, ancient knowledge, union with nature. And a world under threat.
German dairy farmer Gottfried Glöckner told F William Engdahl how the Anglo-Swiss GMO and agrochemicals giant Syngenta tried to crush him after he denounced the company's products as toxic - recruiting the resources of the German state and legal system to destroy his life.
You can actually be better off, healthier and happier with less consumption, says Munasinghe. And it's not just rich countries that need to change, he told Noah Sachs - poor countries too must develop sustainably, or the Earth's resources will simply run out.
Talis Kalnars was a pioneer of 'continuous cover' forestry in Britain, writes Phil Morgan. His woodlands were not only beautiful but profitable, as he nurtured the 'natural capital' of the forest ecosystem, and only harvested the dividend of high value timber.
The 1994 genocide in Rwanda could easily have finished off the mountain gorillas of the Virunga mountains. The fact that they survived is in large part thanks to Eugene Rutagarama. He spoke with Veronique Mistiaen about the primates' future prospects ...
2014 Goldman Prize winner Suren Gazaryan took on the Kremlin in trying to block illegal development at the Sochi Olympics and on the Black Sea coast, writes Sophie Morlin-Yron. Forced to flee to Germany, he can finally get down to researching his beloved bats.
Anyone working to protect badgers from culling will know of Dominic Dyer - wildlife advocate and new director of the Badger Trust. Lesley Docksey met him 'on the hoof' at a recent march - and found out just why the badger campaign is so important to him.
Robert 'Bo' Jacobs was brought up under the shadow of nuclear war. A world expert on the cultural and social impacts of radiation, he lives and works in Hiroshima. Julio Godoy caught the chance of an interview ... and discovered that nuclear war is still going on today - in slow motion.
Greenland's first female prime minister is on a modernising drive to prosperity and independence, But will the combination of melting glaciers, oil, mining projects and mass immigration bring wealth or destruction?
Brian May is best known as lead guitarist for the rock band Queen. But as Lesley Docksey discovers, he is also an astrophysicist, and a committed - and highly effective - advocate for Britain's wild animals, including badgers put at risk by England's cull programme.
For sheer guts, vision and results, a single organisation stands out among the US's environmental defenders - the Alliance for the Wild Rockies. Jeffrey St. Clair met its leader, Mike Garrity, winner of 2014's Grassroots Activist Award.
Ian Redmond, 'ape man', talked to Sarah Stirk about his joy in the natural world, and especially his passion for Mountain gorillas - the only ape (other than humans) whose population is rising.
Robert Swan - the first person to walk to both North and South Poles - will lead his 10th annual International Antarctic Expedition this coming March as part of his Antarctica 2041 campaign. Isabel Sepkowitz discovered what it's all about.
A radical experiment in community supported agriculture is attempting to break farming's reliance on fossil fuels and unsustainable practices. Andrew Wasley met green farmer Ed Hamer for this exclusive extract from The Ecologist Guide To Food.
Andy Hope has been working with solar power for over 25 years and pioneered renewable energy at festivals. He talks to The Ecologist about his passion for sustainability and his self-built, off grid home - 'The Shack' ...
