This study aims to put out on what ratio Bursa province, one of the important heavy industry regions of Turkey, has been affected climatic process called "Global Warming" or "Climate Change". For this intend climatic measurement results from Bursa center, top of Uludag Mount, YeniAYehir and Keles meteorological stations were used. These measurements were taken as minimum temperature at night-time, maximum temperature at day-time, and mean temperature, mean pressure, insolation intensity, insolation duration, mean wind speed, minimum temperature above soil, soil temperatures at depths of 5, 10, and 20 cm rainfall. Overall, our statistical results showed that there was a considerable warming at statistically 1% and 5% levels in summer months, particularly in July Almost all performed measurements confirm this result. According to climatic data for thirty years (1975-2005), in the last twelve years contrary to previous 18 years, mean temperature values were higher than long-term mean value nine times (years) repetitively. Temperatures did not deviated higher than 0.5A degrees C in six of these. At the temperatures below mean, The maximum deviation was -0.4A degrees C.