Global warming is an increase in the average temperature of the earth due to an increase in greenhouse gases such as carbon dioxide, carbon monoxide, methane and other substances in the atmosphere. People who pollute the environment by burning fossil fuels; cutting trees for farmland, timber and paper; increased use of chemical fertilizers on grasslands ... Human activities have serious consequences for life on earth. We have seen hurricanes, tsunamis, droughts, floods and high tides. In extreme weather conditions, people suffer from heat-related diseases and infectious diseases. In short, global warming is threatening humans and millions of earth species. The earth is a common home for all of us and because of this great importance should pay attention to all environmental issues. Taking small but effective actions like reducing energy use, saving natural resources, planting trees or using eco-friendly transportation can make the earth a better place. better place to live.

Freshwater is the most important source of life on the earth. Any living thing may survive without food for days however it is impossible to imagine life without water and oxygen. The ever-increasing human population enhances the demand for more water for purposes like drinking, washing, performing industrial processes, irrigating crops, arranging swimming pools and other water-sports centers. Water pollution is done by the people of all over the world because of increasing demands and competitions of luxuries life. Waste products from many human activities are spoiling the whole water and decreasing the amount of oxygen available in the water. Such pollutants are altering the physical, chemical, thermal, and biological characteristics of the water and adversely affecting the lives inside as well as outside the water.

When we drink polluted water, harmful chemicals and other pollutants go inside our body and deteriorate all the body organs functioning, and puts our lives in danger. Such harmful chemicals also disturb the lives of animals and plants greatly. When plants absorb dirty water through their roots, they stop growing and die. Thousands of seabirds are killed because of the oil spilling from ships and industries. A high level of water pollution is done due to the chemicals coming out of the agricultural usage of fertilizers, insecticides, and pesticides. The effect of water pollution varies from place to place upon the type and amount of water contamination. The degradation of drinking water needs an urgent basis prevention method which is possible by the proper understanding and support from the end of each and every person living on the earth.