How HOT is our future?

Every day we heard people complaining about the high temperature.
It is normal to hear “Very hot, why so hot, why so long never rain?” and so on.
Me too, if u ask me, I would say weather is very hot, and lazy go out since it is hot and uncomfortable unless going somewhere which is cool such as shopping complexes.
But today I will just focus on why is our earth temperature is increasing.
Of course all people know about global warming and our recent program which is Earth Hour. I will not talk on how specifically or scientifically on global warming because im not really expert in this field. I just talk about my opinion toward this topic.
Our earth temperature increase every year, if we see, there is approx. average increase about 0.5degree/year.
I’m not sure exactly the amount of increase, but is it roughly in between the amount. This is because the number of increase is based on regional. There are western, southeast, southern regions.
Why is it keeping increase? But never decreasing? Earth Hour doesn’t decrease the global warming, because it is just temporary. Our daily facilities upgraded everyday, and electronic devices increasing day by day. Power consumption will increase as the result of the electronic devices.
Our life is fulfilling with gadgets and technologies, and we almost couldn’t live without it.
If we calculate our temperature, 0.5/year, every 2years 1degree Celsius. Our country highest temperature is around 36 Celsius.
36+(10x0.5)=36+5=41 Celcius
36+(20x0.5)=36+10=46 Celcius
I cannot imagine that we will live in 46 Celcius as our room temperature in 20years from now. Even now we started to complaint it is too hot. People always argue that when is exactly “End of the world”, “Doomsday”, and so on, but does u think we are able to live in these temperatures? Although calendar is still running, but we cannot live in this environment. Let’s don’t think about when is end of the day, but think about how we gonna go thru these days in our life.
I know most people good in calculating, and of course u guys investing money in shares and stock markets. Some also calculate interest rates and so on. But DON'T u think that our global temperatures are also compounded? For me, I answered it YES.

P/s: I just voice my opinion, doesn’t mean harm to anybody.