I have collected some evidence about the Earth getting warmer by observing trees in my vicinity. In warmer conditions, the trees get thicker and form thick rings. Comparing new trees with older ones helped me understand the difference.
Air pollution occurs when air in the atmosphere gets contaminated with toxic substances, chemicals and gases. The level of these toxic materials is high enough to harm human beings, animals and plants. Miller and Spoolman (2008, p.256) mention that according to WHO, “one of every six people on the earth (more than 1.1 billion people) lives in an urban area where outdoor air is unhealthy to breathe”, much of which comes from the industries and factories burning and emitting lethal chemicals into the air. I live in an urban area, and my observation is that electrical power plants, chemical industries, and metal and paper factories emit poisonous gases in the air. Since urban areas have more factories and industries, these have high level of air pollution than rural areas.
Plastic bags are a big hazard to our ecosystem. They cannot be recycled into something else. They are made up of polyethylene which is a non-degradable material and just changes its shape when burnt without changing its form. It is believed that a plastic bag takes thousands of years to decay entirely. “6.9 billion bags” are used in the world every year, and almost “30 million” of them end up clustering at dumpsites per year (James & Grant, 2005, p.1). So, they continue to be present in our surroundings as a permanent problem. I believe that the hitch actually arises when people do not dispose of the plastic bags properly. This is this unethical disposal that becomes the real trouble for the environment.
The Alaskan or Trans-Alaska Pipeline System was constructed to transfer oil from the North Slope of Alaska to the northern most ice-free port in Valdez, Alaska (Fairbanks