4 ms·
Not an amount that even remotely matters. Traffic in a day is probably many orders of magnitude more than these put out in a year.
by alar44 5y ago
Not an amount that even remotely matters. Traffic in a day is probably many orders of magnitude more than these put out in a year.
- Hankenstein2 5y agoI don't know 3% seems small but significant... "Across the world, thousands of underground coal fires are burning at any given moment. The problem is most acute in industrializing, coal-rich nations such as China.[7] Global coal fire emissions are estimated to cause 40 tons of mercury to enter the atmosphere annually, and to represent three percent of the world's annual CO2 emissions.[8]" From the wikipedia article above