Category: Environment

Damn Those Dams

Dams were a popular way (and still are in some places) to manipulate water reserves for people and as a way to generate energy. The problem with this naturally flowing water being dammed is that it kills fish and negatively impacts other wildlife. Dams cause a huge amount of damage on their local ecosystem and this cascades to more damage with each additional flow blockage.

It’s time to teardown the dams.

There are other reasons to reconsider dams: many of them, like our roads and bridges, are aging. The US Army Corps of engineers estimates that a third of the dams it monitors pose a “high” or “significant” hazard. The same week I traveled to Yosemite, severe rain in South Carolina washed out 14 dams and weakened 62 others. Nineteen people died. It was a grim reminder that some of our dams are already coming down, without our help.

Over the last two decades, organizations like the Sierra Club and American Rivers have spearheaded a movement to remove nuisance dams. Their campaign has been remarkably successful: between 2006 and 2014, over 500 dams were removed from American rivers — more than were taken down over the entire century prior.

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Putting CO2 Emissions on a Map

In the fight to curb CO2 emissions and hold back the rate of increasing climate change, researches have mapped out where the emissions are coming from. Unsurprisingly, they have found that where there is a lot of human activity there are more emissions. This will help convince naysayers and ignoramuses that humans are at fault for climate change and now we know the exact areas where we need to drastically cut emissions.

Using simulation results from 12 global climate models, Damon Matthews, a professor in Concordia’s Department of Geography, Planning and Environment, along with post-doctoral researcher Martin Leduc, produced a map that shows how the climate changes in response to cumulative carbon emissions around the world.

They found that temperature increases in most parts of the world respond linearly to cumulative emissions.

“This provides a simple and powerful link between total global emissions of carbon dioxide and local climate warming,” says Matthews. “This approach can be used to show how much human emissions are to blame for local changes.”

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Preparing Suburbia for Disasters

The suburbs are not resilient places when it comes to disasters or having to quickly change to accommodate new realities. At Nautilus they have dedicated their recent issue to the concept of “home” and they looked at the monotony of the suburbs. The article explores how the suburbs serve to be a place for dwelling but lack the diversity of dwelling that nature once had. Nautilus asks the question: why don’t suburbs reflect the nature they are built in?

Nearly all of the houses in the Challenge feature solar panel roofs. But a dwelling from frosty Canada takes maximum advantage of Alberta’s sunny skies by also harnessing sunshine with a board comprised of forty glass tubes beside the house. Within each glass tube is a copper pipe filled with liquid heated from the sun. Water stored in a tank within the house circulates though the glass tubes, picking up heat from the pipes and returning to the tank where people can use it to shower—no furnace required.

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Houses built in the Southeastern United States might be made of concrete with steel framing, says Rashkin. But rather than making them twister-proof, the steel would thwart wood-eating termites that lead typical homeowners to spend hundreds of dollars on toxic treatments every year. Shelters in humid locales would be made of materials that resist flood and moisture damage. Those near cities might include indoor “living walls” lined with plants that naturally filter the air inside.

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Floating Dam to Capture Waste in the North Sea

The world’s oceans are polluted with massive amounts of waste plastics, so much so that we’ve had to name a grouping of plastic waste because it’s so large. There are many ways to reduce our use of plastics and our production of waste (hint: don’t buy so many things); we still need to deal with what has already been dumped into the oceans.

A new effort launching soon off the coast of The Netherlands will use a floating dam to catch floating plastics. The structure will allow animals though the mess while catching waste better than previous methods.

Plastic waste is a major threat to animals in the sea, who either choke on the material or suffer from related contaminants. But most ocean waste projects try to collect plastic waste with boats that end up inadvertently endangering ocean life. The revolutionary new dam, scheduled for deployment in the second quarter of 2016, will instead use currents to round up waves of garbage—bags, bottles, and other waste—while also letting sea creatures through. Passive, safe collection is the idea.

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Summary of COP21 Climate Deal

The Paris climate (COP21) talks are over and the deal has been struck, many are rightly calling this deal a huge step forward! All countries agreed to cutting emissions while running a more efficient world economy. Nations of the world have agreed that our current trajectory of wastefulness will make life for everything on the planet very very hard. Even Canada, who had a reputation of sabotaging climate change negations, was invited to facilitate some of the talks.

With all the talk and coverage around COP21 it might seem all so overwhelming. Lucky for us, the Guardian has put together a short article summing up all the great points made in Paris.

Long-term global goal for net zero emissions
Countries have promised to try to bring global emissions down from peak levels as soon as possible. More significantly, they pledged “to achieve a balance between anthropogenic emissions by sources and removals by sinks of greenhouse gases in the second half of this century”.

Experts say, in plain English, that means getting to “net zero emissions” between 2050 and 2100. The UN’s climate science panel says net zero emissions must happen by 2070 to avoid dangerous warming.

Jennifer Morgan of the World Resources Institute said the long-term goal was “transformational” and “sends signals into the heart of the markets”.

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