I live on a small island north of the European continent, so I am used to unpredictable weather. I can tell you, as a countryside ranger, that our weather has become less predictable over the last decade. Where I live we used to have snow on a yearly basis, I haven't seen snow in 3 years.
Why is this important? It is important because crops are failing. Now food means people starve. This is an issue that is affecting the whole world. Africa is starving because of the carefree attitudes of the developed world. Jesus says something about that sort of stuff.