The world is round not flat cause first look image your viewing a picture of earth actually the earth is not really round its a shape called an ellipsoid which is kind of squatters and fat plus the world is round cause of the force of gravity
Anthropogenic activities leads to global warming as increasing of chemical pollutants and much more are the common agents of it.It has a bad impact on both people and environment.People's health are affected through unsuitable surrounding and on the other hand, degradation of environment is ultimately to be done.