This June — 2015 — was the hottest June since temperature records began, in 1880. Experts are saying that governments should treat climate change as seriously as threats to national security or public health — from 11 nations, they made the suggestion in a report earlier this month. <br /><br /> Global land and ocean temperature anomalies 1881-2014<br /><br /> <br /><br /> The term temperature anomaly means a departure from a reference value or long-term average. A positive anomaly indicates that the observed temperature was warmer than the reference value, while a negative anomaly indicates that the observed temperature was cooler than the reference value. In this graph, anomalies are with respect to the 20th century average.<br /><br /> According to the National Oceanic and Atmospheric Administration (NOAA), the first half of this year has broken heat records, and last year was already the hottest yet.<br /><br /> Last month, in Pakistan, morgues in Karachi (population 20 million) and hospitals were overwhelmed; officially, more t
