Not cool, its still widely permitted to burn stuff in your fireplace or garden in most parts of the world.
Gathering wood in the forest or ordering a truckload of coal or taking your trash to burn for the annoyance of everyone else.
[1]: https://www.epa.gov/burnwise/ordinances-and-regulations-wood...
And about gathering wood in the forest, if you aren't the owner of the forest that is stealing.