The U.S. and Canada have begun considering this, but part of the answer is in education. Yes, many workers and laborers can transition rather easily to a job in the green economy. But, for some, education and training will be necessary to shift folks into suitable roles for their skill sets and experiences. The government needs to take some initiative in this reagard, as it is totally unreasonable to ask people to pay for this education on their own. 

Not only that, but you'll have people towards the sunset of their careers but not yet in a position to retire that won't want to be educated and retrained because their career is coming to a close already. Hopefully these situations are recognized in some way as well. 

An interesting article, and a lively debate BTL. Although it was not perhaps part of the remit of your article, reducing energy consumption by insulating homes and greater use of heat pumps should also be part of the recovery. I don't know about Canada, but here in the UK the construction industry has suffered during the pandemic. It would be a boost to the economy to improve the energy inefficient buildings we have a lot of, produce jobs and profits, which would then be spent into consumer goods and leisure activities. On other points, although some older workers might be resistant to reskilling, others are not - one home improvement chain here: B&Q has a policy of recruiting part-time older workers as they are more reliable and already have many positive attributes.