He has used his knowledge of the flora and fauna to assist in its return, with wallabies, frogs and tortoises coming back to the forest and lakes as they are restored to their natural state.
Everyone managed to escape back into the forest, but I stayed behind to help a mother who had a baby in her arms and a small girl.
It dates back to 1993, when the Forest Stewardship Council, an alliance of greens and loggers, drew up a list of rules for sustainable forestry.
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After dark, Rivera takes willing participants back into the forest to look for barn owls, which if not seen, are always heard with their distinctive call cutting a haunting sound through the night air.
But neither side could find a breakthrough meaning the Robins have now failed to beat Forest in the last 30 meetings stretching back to December 1974.
It has put in place a rehabilitation program that aims to reshape the dunes and bring the forest to its pre-mining state by putting the indigenous plants back into the ground after the extraction process.
As the Forest Code dates back to 1965, it was something of a pioneering step, certainly for a developing country.
"Without these horses, the fields would go back to forest, " he says.
We drool at clubs like Barcelona, Manchester United and Inter Milan winning the Champions League, but Forest won back-to-back European Cups just over 30 years ago and had one of the most iconic managers -- Brian Clough -- in charge.
But we need to step back out of the trees, look at the forest and question the financing system we have created.
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Dams for irrigation, meanwhile, have a doubly damaging impact on fisheries: they not only hold back water, but also encourage the conversion of forest to farmland in the flood-plain.
The parks are closed, a lot of the enforcement people, the forest guards and things, either go back to their villages--they're not supposed to, but, you know, there's nobody doing enforcement, there's nobody doing anti-poaching.
Back on board en route to Severobaikalsk, the land become mountainous and we passed dense forest bisected by wide rivers and glacial streams.
Should United beat Peterborough and Forest lose to Bristol City, the Magpies will bounce back into the top flight after one season away.
But Forest, with on-loan Chelsea full-back Ryan Bertrand the only new addition to their side, carry over the poor away record that cost them promotion last season - they have now picked up only two points on the road since a victory at West Brom on 8 January.
The Craigslist founder will be hosting a "remotely controllable robotic video camera" from the back deck of his San Francisco domicile, and interested users can log on to discover and classify wild birds in the Sutro Forest.
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