First of all, as many have pointed out, they made the effects of climate change too drastic. It's 1825 in my current game, I'm one of the most advanced civs and have eschewed all carbon emissions, yet the oceans have risen three times already. If the real effects of global warming were that obvious then perhaps we could actually get the world to do something about it! But in addition to this, going green in the game is way too difficult. Wind farms and solar plants take up precious tile space and only produce 2 power. A well-established city just might now have any real estate for that. These tile improvements should generate more power and there should be a way to benefit from them when built outside of your city radius. And don't get me started on tornados! I had a tornado storm last for 15 years and decimate an area the size of Montana. Come on, guys!