Tuesday, August 31, 2010

Paint your roof white and save the world!

This is an interesting story from the CBC today

All new roofs would be white under a Montreal borough's proposed bylaw aimed at taking advantage of a white roof's cooling effects.
Mayor Fran├žois Croteau of Rosemont-La Petite-Patrie wants to make white roofs mandatory on new buildings. Roofs requiring repairs would have to be painted white as well.
Croteau's idea is supported by a Concordia University engineering professor, who says all the world's roofs should be changed to cooling colours.
"Ten metres squared of white roof is equivalent, in cooling the globe, the equivalent to one tonne of [carbon dioxide]," Prof. Hashem Akbari says.
Akbari is trying to persuade 100 of the world's largest cities to switch to light-coloured roofs. Changing all the roofs in the world would be equal to getting rid of all the world's cars for 20 years, he says.
If Croteau gets his way, many of his borough's roofs will be white within about 15 years.
The bylaw would not apply to buildings with peaked roofs, which many residential houses have.
Croteau said making the switch to white roofs would be more expensive in the short term. But, he said, the cost would be offset eventually because white roofs are more durable.
Councillors in Rosemont-La Petite-Patrie will vote on the proposal in October.
In looking for this story I found some of the research that backs up the reasoning, I had no idea of the impact that changing the colour of the roof could have.   If there were a wholesale transition to white roofs, there would be a 33% reduction in the urban heat island effect.

Sarah Thomson, candidate for mayor of Toronto is backing this idea as well, though she is running a distant third of fourth.

You can even calculate the savings from moving to a light coloured roof from a dark one.

I like the idea of showing people that is saves money and not any sort of forced mandate.

Friday, August 6, 2010

The Economics of Site C

I am looking into the economics of Site C and I am interested in anything that anyone can point me in the direction of to make some real estimates of the cost of construction, operation and such.

Things such as:
Cost of the dam
Cost of the transmission lines
Cost of the rebuild of highway #29
Cost of the consultation process
Cost of replacing the agricultural lands
Cost of mitigation of erosion of the high river side banks by the resevoir
Cost of accommodating First Nation rights.

Please send me anything you might know of.


A Video showing Site C Reservoir

Over the next few weeks I am going to take a closer look at the Site C dam project and consider what impacts it may have.  

This is a video by the Treaty 8 Tribal Association showing the proposed reservoir for  the Site C project.  The reservoir will stretch from Fort St John to Hudson's Hope.  

One expense that comes to mind after watching the video is the cost of having to move Highway #29.   It looks like 30-40 km of the highway would have to be rebuilt and four major bridges.   My quick estimate is that about 100 acres of land that will need to acquired for the road right of way.

So what will cost to rebuild this highway?   My quick estimate is between $500,000,000 and $1,000,000,000.   The cost is mainly due to the bridges that will need to be built.   Is this cost factored into the cost of the dam?