Most wildfires are caused by human actions, such as leaving a campfire unattended or discarding cigarettes. Wildfires can also occur naturally from lightning strikes and erupting lava.Continue Reading
In the United States, 90 percent of wildfires are caused by humans, contributing to a total of 5 million acres of land that burn each year. Most fires begin in drought conditions, when the underbrush in forests is very dry. One spark can ignite this underbrush and start an uncontrollable fire. Wildfires can move up to 14 miles per hour and can last for weeks, threatening to burn down thousands of homes.
After a wildfire, there are no plants or trees to anchor soil. This leads to land slides which can further endanger people and their homes. Despite the danger and negative consequences of wildfires, many ecosystems depend on occasional fires, which clear away dense brush and leave fertilized soil. One of the worst fires in North America was the Great Fire of 1910, which occurred in Idaho and Montana. Severe winds combined with dry forests contributed to the fire's ferocity. The fire lasted for two days, but it killed 86 people and destroyed 3 million acres of land. In the end, it prompted Congress to give money to the National Forest Service to fight future wildfires.Learn more about Natural Resources
Smoking tobacco in the form of cigarettes causes cardiovascular disease and chronic obstructive pulmonary disease, including emphysema and chronic bronchitis. Cigarette smoking is also responsible for most cases of lung cancer, according to the U.S. Centers for Disease Control and Prevention. Smokeless tobacco, such as chewing tobacco and snuff, contributes to oral cancer, stomach cancer and cancer of the esophagus, and may increase the risk of cardiovascular disease, states the American Cancer Society.Full Answer >
3.7-volt batteries come in many different form factors and are commonly used in portable electronic devices including cellphones, digital cameras, camcorders, handheld gaming devices and electronic cigarettes. The most common 3.7-volt batteries are lithium-ion batteries, which come in flat and cylindrical form factors.Full Answer >
Cardboard boxes, water bottles and refined copper are examples of reusable resources. Unlike recyclable resources, which require reprocessing to be usable again, reusable resources can be used several times without having to remanufacture them.Full Answer >
Renewable fuels are fuels made from renewable resources. Where fossil fuels are finite, renewable fuels are infinite and examples of renewable fuels include vegetable oil as fuel and methanol made from carbon dioxide.Full Answer >