Main causes of high temperature weather in Adelaide and Calcutta

Global Warming Now the temperature all over the world is abnormal, so the reason is the greenhouse effect. What's more, Adelaide is very close to the Antarctic in Australia, and there is an ozone hole, so the temperature has lost its regularity since five years ago, and it is normal to have ultra-high temperature. I remember I stayed near 50 degrees in Melbourne for a few days last year, so the reason is very simple, that is, the word global warming!