Our actions have consequences. The fuels we burn at home, and at work, through our travel, and through the things we buy cause excess carbon dioxide and other gases to enter the atmosphere. These cause the planet to heat up and create dangerous changes to our climate. The following picture illustrates the carbon cycle.
The factories and houses emit carbon. The animals emit methane and carbon. Deforestation causes more carbon to go into the atmosphere. Nature can cope with much of this, but humans add too much for it to manage. As a result, the coral reefs in the sea die, we get more floods, and the people in continents like Africa suffer famine.
Closer to home, we have the Severn, which floods more often, causing chaos. Remember this in Ironbridge:- uploaded to Youtube by the Shropshire Star. Only if we human beings understand all this, will we take action to save our planet.