Sydney Morning Herald: The world remains on course for another record hot year with the first four months of 2015 setting a new high for temperatures amid more signals the emerging El Nino event will be a strong one.
Combined land and sea surface temperatures in April alone were 0.74 degrees above the 20th century average, making it the fourth warmest on record, according the US National Oceanic and Atmospheric Administration.
Sea-surface temperatures last month were the warmest in records going back to 1880, surpassing...