In the last hundred years, average global temperature has risen a mere 0.7 degrees Celsius. There is ample evidence that results from ground-based weather stations have been contaminated by urban sprawl, tarmac, car parks, vehicles, buildings and air-conditioning units Temperature data from satellites over the last 30 years show some warming, but less than that from ground stations. […] This slight 0.7 degree rise is entirely consistent with well-established, long-term, natural climate cycles.