2015 Event The U.S. Environmental Protection Agency is seeking to reduce greenhouse gases from oil and gas operations, proposing a rule to cut methane emissions from these sources by 40 to 45 percent of 2012 baseline levels over the next 10 years 1993 Event Methane gas explosion in Secunda coal mine South Africa, kills 50 1960 Event Rock falls traps 437 at Coalbrook South Africa, 417 die of methane poisoning