World experience average temperatures of 13.6°F ( 56.4°C ) last month - 1.5°F above average for the 20th century . First 3 months of 2015 have set new high temperature marks , and the trend could continue throughout the year . Scientists warn fossil fuels are pushing greenhouse gas into the atmosphere , leading to increased temperatures . But El Niño , a blob of record hot water in the Northeast Pacific Ocean , could also be driving up temperatures .
World experience average temperatures of 56.4°F ( 13.6°C ) last month - 1.5°F above average for the 20th century . First 3 months of 2015 have set new high temperature marks , and the trend could continue throughout the year . Scientists warn fossil fuels are pushing greenhouse gas into the atmosphere , leading to increased temperatures . But El Niño , a blob of record hot water in the Northeast Pacific Ocean , could also be driving up temperatures .