What are they going to be talking about?
The main topic will be by how much countries will cut their carbon emissions.
What are carbon emissions?
This is the carbon dioxide which is pumped out into the atmosphere when fossil fuel such as coal and oil are burned to make energy. Carbon dioxide is the main green house gas which is causing climate change. Almost all scientists agree now that these emissions are making the earth warmer by trapping energy in the atmosphere.
Have these meetings been going on for long?
Yes. It all goes back in the 1992 Earth Summit which was held in Rio, Brazil. Before this climate change wasn't really widely known or talked about. But it's taken some politicians a long time to agree that climate change is a problem and to agree to take action.
Industrial age: factories have been pumping huge quantities of carbon dioxide into the atmosphere for over a hundred years and it's having a devastating affect on the world's climate