The chief danger of radiation is the damage it can cause to living cells. Radiation can damage the DNA inside a cell's nucleus, and if the DNA becomes sufficiently damaged, the cell can become cancerous. Exposure to high amounts of radiation, or lower amounts over a long period of time, can significantly increase the risk of developing cancer.Know More
There are a number of different types of radiation. Ultraviolet radiation is part of sunlight, and can cause skin cancer with enough exposure. Largely, however, the threat from ultraviolet radiation is greatest in areas of the globe where the ozone layer has become depleted. X-rays are also emitted by the sun but absorbed by the planet's atmosphere. Most x-ray exposure occurs as a result of medical exams.
Alpha, beta and gamma radiation are products of nuclear reactions, and all are dangerous to humans. Alpha radiation cannot penetrate the skin, but if a particle emitting alpha radiation is swallowed or breathed in, it can do significant damage to the cells in internal organs. Beta and gamma radiation have suitable wavelengths to penetrate the skin and damage cells inside the body. A radiation source may put out multiple forms of radiation, making any radioactive accidents extremely dangerous for those in the immediate area.Learn more about Human Impact
Ecotourism can bring needed funds to conservation efforts around the globe, but it can also put stress on wildlife and local populations, if not handled correctly. The more visitors a fragile ecosystem has each year, the more likely the traffic is to damage habitats and affect the local environment. Ecotourism can also bring outside investment and development to a region at the cost of local jobs and infrastructure.Full Answer >
The biggest disadvantages of deforestation include loss of animal habitats, climate change, soil loss and hydrological factors. Deforestation involves the clearing of massive portions of the earth's forests.Full Answer >
One advantage of the waste-incineration process is that it reduces the weight and volume of the waste. This process results in a less hazardous amount of waste. The gas and residue that incineration produces, such as slag and ash, is odorless.Full Answer >
The Oregon Forest Resources Institute lists minimizing forest floor and soil disturbance, greater efficiency and economy for timber harvesting, and providing full-sun conditions for certain types of species as the advantages of clear cutting. The disadvantages of clear cutting are numerous and include a poor aesthetic, habitat disturbance, and increased stream flow and soil erosion, particularly on slopes.Full Answer >