what is the meaning of global warming

3 answers

Temperatures in the Earth's atmosphere are rising or warming, along with waters and soil.
http://web.mit.edu/12.000/www/m2010/finalwebsite/background/globalwarming/definition.html
You can always find info on both sides of this topic. Here's another from MIT:
http://www.technologyreview.com/article/416786/global-warming-vs-the-next-ice-age/

I like to read whatever I can find, mostly from sources I consider reputable, such as MIT and other well respected universities. Read everything you can!