... survival: air, water, food, fibers, medicines, and building materials. Children need to grow up aware of the nature around them. As human beings we have a responsibility to preserve the actual value of nature both for ourselves and for future generations. In recent decades, there has ... in the air, water, and soil. A substantial number of people have conditions such as asthma, other respiratory problems or difficulties with additional organs of the body. The contaminants in the air have not only affected humans, but animals as well. The atmosphere contains a lot of dust ... that holds...

• Word Count: 2478
• Approx Pages: 10
• Has Bibliography
• Grade Level: High School

... to life. Malignant tumors are cancer. They can invade and damage nearby tissues and organs. Cancer can also break away from a malignant tumor and enter the bloodstream and lymphatic system. Through the lymphatic system is one of cancers best modes of transport for spreading to form new tumors in ... these are radiation, chemotherapy, surgery and the rapidly growing field of genetic therapy. It was discovered that when radioactive waves were directed on human cells, the cells would be destroyed. The idea of using this technology on cancer was a good one but was unsuccessful at first due...

• Word Count: 1594
• Approx Pages: 6
• Grade Level: High School