One alternative would be a clean energy portfolio (see http://www.miningandenergy.ca/education/article/new_study_raises_alternate_solutions_to_site_c/ or https://www.bcsea.org/bcsea-news/site-c-there-better-way). Based on studies I did in considering alternatives to the Darlington retrofit in Ontario, it is also clear that investing in energy conservation (including far more rigorous building codes) would be a far more cost-effective and ecologically sustainable alternative.