The environment did not feature significantly in the referendum but emerged as a major issue in its aftermath. In the past year, in particular, it has achieved extraordinary political prominence.

Floods, bushfires, and drought, along with the School Strike for Climate, tireless campaigning by Greta Thunberg, and (occasionally misplaced) campaigning by Extinction Rebellion, have kept the environment and climate change in the headlines.
https://ukandeu.ac.uk/brexit-offers-an-opportunity-for-the-government-to-deliver-on-its-environmental-promises/