Difference between Mudjacking and Polyurethane Concrete Raising. Also called foam lifting, polyurethane for concrete raising has been in practice for about 20 years. However, the price of the equipment and polyurethane material made it way too expensive for private contractors to adopt and replace traditional mudjacking.
Farmed salmon available in Washington state markets is produced in Washington State, Canada, Maine, or Chile. Studies on salmon from these sources have shown low levels of organic contaminants in the fish.
On average, it takes two to five kilograms of wild fish (used in the feed) to produce one kilogram of farmed salmon. In Chile, the ratio is often much higher with as much as 8 kilos of wild fish used to produce 1 kilo of farmed salmon (Terram Foundation Report). Most of the wild feed for BC farmed salmon is taken from the southern hemisphere, diverting local protein to raise a luxury product for northern consumers.