I've only heard of them scrapping carbon cap + trade and fighting against carbon tax. If they've also dismantled regulations regarding more acute, pressing types of pollution I'd like to know.
http://www.rabble.ca/news/2018/11/doug-ford%E2%80%99s-govern...
2. Cancelled green subsidy program (GreenON) on efficient thermostats and lights (https://www.thestar.com/business/real_estate/2018/06/20/gree...)
3. Ontario electric car subsidy is no more
4. Cancellation of 758 renewable energy projects / contracts. https://www.theglobeandmail.com/business/article-municipalit.... (paywalled)
5. Intend to open up protected areas (greenbelt) for developers. This has not been executed yet.