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Learning Tree - Seeds

First steps in understanding the problems locally and around the earth.

There's No Tomorrow - Animated Full Length Documentary, Long

Details: Published on Wednesday, 17 July 2013 11:36; Written by mic

Published on 4 Sep 2012

There's No Tomorrow is a half-hour animated documentary about resource depletion, energy and the impossibility of infinite growth on a finite planet.
Inspired by the pro-capitalist cartoons of the 1940s, the film is an introduction to the energy dilemmas facing the world today.
"The average American today has available the energy equivalent of 150 slaves, working 24 hours a day. Materials that store this energy for work are called fuels. Some fuels contain more energy than others. This is called energy density."
"Economic expansion has resulted in increases in atmospheric nitrous oxide and methane, ozone depletion, increases in great floods, damage to ocean ecosystems, including nitrogen runoff, loss of rainforest and woodland, increases in domesticated land, and species extinctions."
"The global food supply relies heavily on fossil fuels. Before WW1, all agriculture was Organic. Following the invention of fossil fuel derived fertilisers and pesticides there were massive improvements in food production, allowing for increases in human population.The use of artificial fertilisers has fed far more people than would have been possible with organic agriculture alone."

Documentary: Mountain pine beetle poised to ravage Eastern Canada

Details: Published on Friday, 12 April 2013 09:00; Written by mic

THE BEETLES ARE COMING! - FILM ON CBC

Billions of mountain pine beetles from B.C. are expected to devastate forests in Ontario, Quebec and the Maritime provinces as they munch their way east over the next two decades, scientists predict in a new documentary.

"Most every scientist studying the beetle feels that it's inevitable," said David York, the filmmaker behind The Beetles Are Coming, which airs on CBC TV's The Nature of Things Thursday.

"It's going to happen and we're going to have to adapt."

The rice grain-sized mountain pine beetle has already wiped out an area of B.C.'s lodgepole pine forest as large as Nova Scotia and New Brunswick combined. It has since crossed the Rocky Mountains into Alberta and is heading for Saskatchewan.

The mountain pine beetle is native to northern B.C. where it has long played an important role in the renewal of lodgepole pine forests, York said.

"The beetle's job is to take out 80- to 100-year-old over-mature pine trees, thin out the canopy and allow room and nutrients for younger trees to grow."

Lodgepole pines have evolved defences against the beetles, which have also traditionally been kept in check by harsh, cold winters, limiting their damage to small outbreaks every 25 years or so.

Natural balance disrupted

York's film, based on a book Empire of the Beetle by Calgary writer Andrew Nikiforuk, explores how climate change has thrown the natural balance of the beetle-lodgepole pine relationship out of whack, and looks at the serious consequences for both humans and natural ecosystems.

The mountain pine beetle has destroyed millions of hectares of B.C. forest, turning tree-covered mountains red and then grey.(52 Media Inc./CBC)

Warmer winters have allowed beetle populations to explode and wipe out millions of hectares of B.C. forest. The beetles have expanded their range into Alberta and jack pine forests that have no defences against this invader. The effects on forest ecosystems and the forestry industry have been devastating.

York said the story is really an illustration about the impact of climate change.

"Nobody would have expected that a simple degree and a half of warming in the interior of B.C. would unleash a beetle outbreak in 18 million hectares worth of pine forest," he said.

He added that while it's relatively easy to predict certain effects of climate change, such as drier weather that leads to droughts, "it's all of the unanticipated effects that are going to be what bite us in the ass."

Globe2012: The One Keynote Address to Take to the Bank

Details: Published on Wednesday, 24 October 2012 14:36; Written by registered

What does the future hold for us in an energy-constrained economy?

Do you search for reliable, thoughtful people whose insights will help navigate the massive changes the world is undergoing? Are your efforts mostly futile? We understand your frustration. In a media environment long since overloaded with unfiltered information, it is becoming harder to sift through the crap that passes for reasoned, impartial analysis these days.

Last week was different.

Ivan Krastev: Can democracy exist without trust? TED talk

Details: Published on Saturday, 13 October 2012 21:56; Written by mic

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