A line chart showing how many confirmed releases into the environment came from underground petroleum systems, from 7,421 in 2005 to 4,354 in 2023.
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
4,000
4,200
4,400
4,600
4,800
5,000
5,200
5,400
5,600
5,800
6,000
6,200
6,400
6,600
6,800
7,000
7,200
7,400
7,600
7,800
8,000
8,200
Confirmed
releases