A lot of scientists believe global warming to be true. I also have read that weather patterns do get warmer and colder as patterns emerge. Actually we are in the pattern for extensive hurricanes in the east, has to do with warmer ocean waters, the hurricane patterns last for approximately 20 years.
But no need to worry about global warming! I learned recently as the polar caps melt then the fresh water will stop the currents from circulating in the ocean and then the Earth will cool bringing on another ice age - this too apparently is a pattern.
All we need is a couple of major volcanos to erupt spewing dense ash into the atmosphere and we will get cooler too. When that asteroid hits the Earth and puts the climate into a tizzy ...
I'm a firm believer that nature will probably balance it all out and us humans will just be in the way .....