Global warming used to be a hypothesis about 20-30 years ago. Scientist projected that if the pollutions and emissions of CFCs continues, global warming would start as a result of Ozone layer depletion. I do not wanna prove some obvious things, since winter is getting colder ( right now) and summers are getting warmer, glaciers are melting, polar bears need home, sea levels are rising and i am driving carbon emitter every single day and so do you guys. those things might be affecting or being affected in very minimum level but it will make difference in large volume and effects will be seen after certain period of time whether you believe or not.

And we Nepalese, even myself in general believe it is bad luck when cat crosses the road when u are trying to go somewhere or empty utensils in the way out or sneezing or asking where u are heading out and other BS without any evidence. ( you guys also believe somewhere there in your heart even though you gonna bark, i do not believe in that Sheet)So y dont we start believing scientific facts and calling those superstitious beliefs as hoax. 

Making long story short, Global warming is happening but its effects are very low right now almost not detectable by general public. It might not affect our generation but our future generation will blame us for all this crap and humans might need gills to survive. Probably after couple decades or more, people will start working on the problem which gonna be too late.