Well that's a good question and I'm thrilled that you are being observant. There are many theories and explainations out there for just about any type of personality or belief system that one might have from global warming, its just the weather changing a little wacky and there's nothing to it in the grand scheme of things being that we only have a couple hundred years of history to go off from and the Earth is billions of years old to more radical views like the government is controlling the weather or that there's a very large planet that has a very long cycle in our solar system of about 13,000 years and its coming back closer now so the gravitational pull is affecting the tilt of our planet and messing up our weather (This theory is linked to the most ancient writings we have found called the Sumarian tablets in which an ancient civilization wrote down their history and beliefs along with information about our solar system that includes this Planet X or Nibiru as they call it.)
So there are MANY different beliefs and theories out there. I have noticed and looked into a lot of things that I have noticed is strange or seems out of the ordinary... I have yet been able to come to a conclusion to what is REALLY going on, whether its from being too open minded or because a few things could explain things but are contradictory I'm uncertain, but at least it keeps my mind busy :)
Read up and tell me your thoughts and what you believe is going on... I am always happy to talk to an open minded person that is observant, does research/fact finding and is looking for the truth :)
If you are really open minded and enjoy reading about conspiracy theories or different ways to explain events or history other than the main stream explanations (and can handle talk about aliens), I would strongly suggest reading into the Sumarian texts about religion, how our solar system and Earth was formed, etc.
Personally, I don't rule out the theory that persons with power or governments have the capability to affect the weather but I believe that the ice poles melting and the colder water circulating down into the warmer regions has a great effect on the weather patters on a global scale. There are a lot of. scientific based theories that are sound in their observations and facts... but I also believe that there could be other factors that could be at play or taking advantage of circumstances that is making things worse or using it to their advantage for different reasons. I tend to not rule things out just because it puts me into a smaller percentage of persons with similar views or open mindedness.