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We must pay greater attention to keeping our bodies and minds healthy and able to heal. Yet we are making it difficult for our defences to work. We allow things to be sold that should not be called food. Many have no nutritive value and lead to obesity, salt imbalance, and allergies.
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Canada should always open its doors to those who are oppressed or in cases of emergency. When Canada offered refuge to 50,000 boat people in Vietnam in the 1970s, I was particularly proud to be Canadian.
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The voluntary approach to corporate social responsibility has failed in many cases.
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More than a billion people lack adequate access to clean water.
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Think about a seed. Once it lands, it's stuck. It can't move to find better soil, moisture or sunlight. It's able to create every part of itself to grow and reproduce with the help of air, water and sun.
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We must reinvent a future free of blinders so that we can choose from real options.
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Over and over, the economy has determined the extent of our response, but how much value does it place on breathable air, drinkable water, edible food and stable weather and climate? Surely the economy is the means to a better future, not an end in itself. Surely it must be subordinate to a rich, diverse ecosphere that sustains all life.
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Hydraulic fracturing requires massive amounts of water. Disposing of the toxic wastewater, as well as accidental spills, can contaminate drinking water and harm human health.
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The increasing frequency of extreme weather events, droughts and floods is in line with what climate scientists have been predicting for decades - and evidence is mounting that what's happening is more severe than predicted, and will get far worse still if we fail to act.
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We pride ourselves on our democratic traditions, but in Canada, women couldn't vote until 1918, Asians until 1948, and First Nations people living on reserves until 1960.
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Education has failed in a very serious way to convey the most important lesson science can teach: skepticism.
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Over and over, we hear politicians say they can't spend our tax dollars on environmental protection when the economy is so fragile.
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When I was a kid, being outside was the norm. Rain or shine, our parents would tell us to get out of the house.
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Being an environmentalist isn't all about doom and gloom.
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If America wants to retain its position as a global power, its president must listen to the people and show strong leadership at this turning point in human history.
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My earliest memory from childhood is of fishing with my father. And I remember vividly we were in a store, and we were buying a pup tent to go on our first camping trip.
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Just as fossil fuels from conventional sources are finite and are becoming depleted, those from difficult sources will also run out. If we put all our energy and resources into continued fossil fuel extraction, we will have lost an opportunity to have invested in renewable energy.
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If we pollute the air, water and soil that keep us alive and well, and destroy the biodiversity that allows natural systems to function, no amount of money will save us.
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Although it's the second largest country in the world, our useful area has been reduced. Our immigration policy is disgusting: We plunder southern countries by depriving them of future leaders, and we want to increase our population to support economic growth.
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Do you know how much land is under ice, rock and snow? Do you know why 90 percent of us live within 100 kilometres of the U.S. border? We have this idea we're a vast country. But the reality is that a lot of it, a huge amount, is uninhabitable.
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If we want to address global warming, along with the other environmental problems associated with our continued rush to burn our precious fossil fuels as quickly as possible, we must learn to use our resources more wisely, kick our addiction, and quickly start turning to sources of energy that have fewer negative impacts.
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I've always been more interested in organisms that can move on their own than in stationary plants. But when I canoe or hike along the edge of lakes or oceans and see trees that seem to be growing out of rock faces, I am blown away. How do they do it?
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Most North Americans know that human-caused global warming is real, even if political leaders don't always reflect or act on that knowledge.
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The human brain had a vast memory storage. It made us curious and very creative. Those were the characteristics that gave us an advantage - curiosity, creativity and memory. And that brain did something very special. It invented an idea called 'the future.'