The earth is considered as one of the most beautiful planets in the universe. It is the only planet in our galaxy that has enough water to support life. Unfortunately, our planet is suffering due to many problems which should be solved before it is too late. Starting off one of the major problems in our world is climate change. The ability to adapt, mitigate and reduce carbon emissions will be decisive to preserve the world for future generations. The last IPCC report has provided more evidence regarding the rise in temperature and sea level. Next would-be food and water security which is basic need for all life and good health. The water crisis has worsened to a point whereby the amount of drinking water has become alarmingly low. Much of the water today is regrettably polluted. Changes in climatic conditions in most parts of the world have led to water-related phenomena. This includes droughts, floods, and the rising of the sea level. By and large, the changes in climatic conditions in the world have led to water crises with regard to   water resources management. There is no question that inequality is prevalent in all sorts of human society. No matter the level of human development, inequality seems to be existent. It is even present in simple cultures where there is minimal variation in wealth. Inequality, also referred to as social stratification, has been a core subject to sociologists for many years. Sociologists try to understand, explain and prescribe solutions to the issue of inequality. Despite of major sociologists such as Max Weber, Karl Marx and others trying to prescribe solution to inequality, the issue continues to persist. Marx was critical of capitalism and accused it of existence of social classes. This are some issue I would like to talk about in this unit.