1. Lumber prices - https://fortune.com/2021/12/02/lumber-prices-rising-again-2022/ 2. Tariff - https://www.washingtonpost.com/opinions/2021/12/02/biden-lumber-tariff-mistake/ 3. Housing costs - https://torontosun.com/news/national/get-off-your-ass-ets-trudeau-pm-nailed-on-rising-housing-costs-during-his-reign 4. Housing costs - https://financialpost.com/investing/david-rosenberg-housing-heads-the-myriad-vulnerabilities-facing-canadian-households 5. Household debt - https://financialpost.com/executive/executive-summary/posthaste-household-debt-isnt-the-only-debt-canadians-should-be-worried-about 6. Household debt - https://www.marketwatch.com/story/bank-of-canada-raises-concerns-over-high-household-debt-271637690414 7. Most expensive cities - https://nationalpost.com/news/world/israel-middle-east/tel-aviv-is-now-the-most-expensive-city-in-the-world 8. Affordable housing - https://ca.movies.yahoo.com/iwbi-special-report-chapter-series-170607131.html 9. 3D housing - https://www.dailymail.co.uk/sciencetech/article-10268041/Worlds-eco-sustainable-houses-3D-printed-Italy.html 10. Housing bubble - https://financialpost.com/investing/david-rosenberg-canada-second-frothiest-housing-market