This isn't any surprise to anyone who has remotely been paying attention. There is a boatload of anecdotal evidence for urban growth increasing temperatures: weather stations that were on grass runways in the 1920s are now in the middle of concrete and tarmac runways, etc. There's also the mystery of why temperatures are reported to be the hottest ever recorded but the high temperature records are all old (and sometimes very old - like the 1913 date for hottest temperature ever recorded in the USA).
Of course, if the reported warming is mainly due to increased in daily low temperature, then this study on urbanization provides a very neat explanation - all the concrete and asphalt absorbs heat during the day and releases it at night, raising the recorded low temperature.
But hey, don't let actual science get in the way of a multi-trillion dollar power grab by the global New World Order.