It is very inexpensive to grow and harvest. Insects won't eat it.
Have you ever seen a truck load of Canola being delivered from a farm? I have. Its my job. It is CRAWLING with insects. THICK with them. They love Canola.
The reason its potentially cancerous is that Canola is sprayed with A LOT of pesticides and chemicals, and it is one pulse grain that actually aborbs these into the seed, instead of the leaves and or roots. I work for CBH and have seen the reports. Its not the canola seed itself, its the application of chemicals which it then absorbs and sends to the seed thats the problem.
And if you keep Googling you will see it IS genetically modified to be for human consumption. Its called Canadian Oil Low Acid for a reason, to be fit for human consumption :confused: