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Transcript of Resource Issues
Renewable Energy and Recycling
In recent years resources in the natural environment have been depleted:
Pollution has been a major problem for a lot of different reasons in the world, especially in the modern world environment.
Pollutants comes from cars, electricity generation, burning of certain materials, and from some machinery.
The main cause of water pollution is the wastes that are dumped in bodies of water, which can cause harm to aquatic life.
Most of this from of pollution comes from waste and plastic trash.
South Pacific; temperatures on a global average have risen 2 degrees Fahrenheit during the past century, and many models predict a greater rise this century.
The rapid depletion and destruction of resources call for a need to reuse and recycle resources. Since nonrenewable resources are (or were) easier to obtain and use, there is great reliance on fossil fuels (coal, natural gas, and petroleum). However, there is great potential for the growth of renewable resources such as biomass, hydroelectricity, geothermal heat, solar energy, and wind power. In addition, the recycling of products decreases the demand for resources to be extracted.
Conservation- the preservation, protection, or restoration of a natural area, or of a species
Biodiversity- the variety of species across all of Earth, or of the gene pool in a certain place. Biodiversity is often harmed by human actions.
Fossil Fuels such as coal, Petroleum, and natural gas have recently dropped in production, because reservoirs of them are running out.
The supply of fossil fuels is running out, and may soon be gone, or only exist in very difficult to use forms.
Conservation's Two Types
Aspects of Sustainability
99% of Earth's crust is composed of only 12 minerals, so most of the ~4000 minerals on Earth are rare
The leading nonmetallic minerals being used now are: Phosphorus, Potassium, Calcium and Sulfur, which are all vital for farmers and if supplies run out, farmers will have big problems growing crops without fertilizer.
Water Pollution is a major problem for much of the world, because of unsanitary conditions, as well as dumping waste in more developed regions.
Water pollution is a problem because water is a necessity for basically all forms of life
An overview of what you have seen.
Summary- Noun a brief statement or account of the main points of something
During the past century, the Earth's surface temperature has increased by 2 degrees Fahrenheit. This increase is caused by what is called the greenhouse effect, where greenhouse gases trap some of the radiation coming from the Earth's surface, from leaving the atmosphere, making the Earth stay warm. The Greenhouse Effect's increase is a result of the increase in the burning of fossil fuels, and the processes that occur when the Earth warms (feedback).
Using resources in a way that meets present needs (and possibly wants), while allowing future peoples to also meet their needs (and possibly wants)
keeping natural environments as they are with no human interference
To be sustainable, a certain amount of money is needed sometimes, for example, the transition to more sustainable forms of energy will require some funds
if the environment is not treated well, there will be future consequences for example: if SO2 emmisions are not regulated, acid rain will harm crops later
If a people are busy with social issues, they will focus on things other than beign sustainable, for example when overthrowing a dictator, no one asks if burning the dictator's palace is a sustainable action.
Biodiversity is critical to the protection of the ecosystem, as when biodiversity is decreased, if a disaster, such as a disease happens, it is less likely that many creatures will survive, and many types of creature are needed for most functioning ecosystems. In addition, biodiversity is part of the beauty of nature, and its removal would harm many people's interest in nature's preservation.
We depend on Fossil Fuels in Our Daily Lives
It takes all kinds to make a biosphere.
washing into water
air pollution is usually gaseous, but solid particles can become airborne (particulates).
some air pollutants cause global warming (CO2, methane. etc.)
a few air pollutants (CFCs) can destroy ozone, reducing the protection that Earth enjoys from dangerous ultraviolet rays.
other air pollutants can cause sickness or death (Ozone, co, etc.)
harm to land surfaces or things under the land's surface caused by human actions
solid waste, and destruction of natural resources (such as soil erosion) are the major types of land pollution.
land pollution can also contaminate groundwater, which is used for drinking,
land fills are sites where land pollution (mainly trash) is concentrated.
melting permafrost can release air pollutants
aluminum, glass, most paper, and many plastics can be recycled
recycled materials are reused in new products, so manufacturing requires less resource extraction
energy that can be obtained from sources that will replenish quickly (mainly biomass), or will never run out (solar, wind, water, etc.)
Types of Renewable Energy
solar energy can be used to generate electricity by two methods: concentrated solar power and photovoltaic panels
concentrated solar power can work at night form stored heat, but requires a lot of strong sunlight.
photovoltaic panels only work during the day, but can operate with less intense light.
solar energy can also be directly used to cook and heat houses and water.
Solar energy cannot be used up
Solar energy is best used in sunny areas, and (An)Arctic areas may be unable to use it, due to the long winter night.
biomass is simply matter in living things (usually plants)
biomass can be made into biofuels, like ethanol
Biomass is also commonly burned to heat a home or cook food, especially by peoplle livind in less-developed countries
biomass will come back swiftly on its own, but if overused, it can be used up with no chance of return.
Biomass can be found almost everywhere, but some regions may have more biomass than others.
wind energy is energy obtained by the wind pushing things around
wind turbines are propelled by wind to generate electricity
windmills were also once used to drive machinery, although this is rare now.
Wind cannot be used up
Wind energy can only be used in windy areas
hydropower is energy made from the movement of water
hydroelectricity is electricity generated by the motions of water, and can be made from rivers, waterfalls, tides, waves, and ocean currents
however the motion of water without electricity involved was once used to power machinery, and is still used for work in some less-developed countries.
Water movement cannot be used up
many parts of the world can use hydropower, but some areas that do not have large, moving bodies of water cannot.
geothermal energy is energy from Earth's internal heat, specifically from water heated by the Earth's internal heat
Geothermal energy can be used to produce electricity
Geothermal energy can also
be used to warm building and pools, and to cook things
Geothermal heat cannot be used up, but the heated water that it is extracted from can be used up.
Only some areas of the world can use geothermal energy, though.
Renewable Energy and Recycling
Aspects of Sustainability
the Opposite of this
How Pollutants and Global Warming Interact
many vital natural resources are being used up
This includes the fossil fuels which power our world and are a major part of our daily lives, and minerals vital to agriculture as fertilizers.
Pollution is contamination of the air water or land, and is capable of causing great harm to people and nature
Air pollution causes global warming, an overall warming in the Earth's global climate
due to resource depletion, resources need to be recycled, not just disposed of
In addition, new long-term energy solutions need to be made to compensate for diminishing supplies of Fossil Fuels
some alternate energy sources are the Sun, wind, hydropower, geothermal heat, and biomass
--the preservation of nature, which comes in two forms
sustainability is acting in a way to meet present and future needs, for people, the economy, and the environment
preservation is preventing nature from being influenced by humans
biodiversity is the variety of life, and one of the major things conservation seeks to protect