Many countries are already implementing a price on carbon for certain industries or for certain regions. According to Carbon Credit Capital, the current weighted carbon price is $34.99, which is up from around $20 near the end of 2020.

The the EU ETS, which had never consistently traded for more than €30 has now jumped up to more than €50 in May 2021.

Our list of prices in countries either in the form of a tax or a trading schemes comes from https://carbonpricingdashboard.worldbank.org/

We also have the list of net zero countries here: https://www.climatechangenews.com/2019/06/14/countries-net-zero-climate-goal/

To provide context we multiply this times the company's annual emissions and take this as a percent of enterprise value. This will be a regular part of the company's operational expenses and may be increasingly material for some industries.