Ecology is about the relationship between people and vegetable, people and animals. It's a tree that has very long branches. If you can't know what ecology is, ask yourself the following questions. All this is ecology. If we do something for the environment, environment will do something for us.
People live together with other living beings.
We help each other. We both need the things without which there will be no life - like water, sun and air. We must take action and fight against ecological and environmental problems, which are destroying our environment, which are destroying our life. If we do something for the environment in the same way environment will do something for us. This will fall to zero if we don't stop using water like we're using it now.