The major disadvantages of whaling include the potential extinction of some whale species, the unsafe levels of mercury that whale meat can contain and the potential harm to ecosystems that removing whales can cause. In addition, whale watching is a lucrative business in many parts of the world, and whaling could have an impact on that activity, according to Nature Publishing Group.Know More
A major problem with whaling centers on the impact to whale populations. For example, gray whales have been extinct in the Atlantic for hundreds of years. It is also believed that there may be as few as 4 percent of the total population of blue whales that lived before exploitation began.
Fewer whales can also have an impact on the ecosystem. When a whale dies, its body sinks to the bottom of the ocean. On the ocean floor, a whale's body provides food to many different creatures that normally do not have access to such an abundant food supply.
While many proponents of whaling claim that the practice creates jobs and puts money into the economy, it also has the potential to damage a country's economy. It has been estimated that marine tourism related to whale watching could generate $413 million each year. In addition, whale meat, which is one source of income from whaling, can contain dangerous levels of mercury and lead to mercury poisoning.Learn more about Human Impact
Plastic poses several environmental risks, including leaching chemicals and toxins into surrounding ecosystems, threatening the health of local animal populations and releasing greenhouse gases into the air. The negative effects of plastic vary depending on the type of plastic in the environment, quantity and length of exposure time. Plastics contain compounds, such as PVC and BPA, elements deemed a health risk to humans and animals while the leaching of these compounds into air and waterways poses a health and safety risk for nearby organisms.Full Answer >
Human impact on tundra regions includes melting permafrost caused by climate change and physical damage to ecosystems and habitats resulting from the mining and extraction of oil, natural gas and other minerals. Tundras may also suffer damage from oil spills, air pollution and ozone depletion within the upper atmosphere.Full Answer >
A major disadvantage to burying trash in landfills is the potential to pollute surrounding soil and groundwater with toxins and leachate. When trash decomposes, it releases methane and other greenhouse gases that contribute to climate change and may also cause health problems to humans and animals.Full Answer >
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.Full Answer >