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Human population is the number of people on Earth. As the number of people increases, the strain on the natural resources of Earth increases. The current population is 7.6 billion and growing. The population will eventually create a greater demand on Earth's resources, and there is not enough to sustain this large growth. By 2100, the human population will eventually stabilize between 8 and 11 billion.

Examples of finite resources include petroleum and coal.

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definition: the diversity of life forms in an environment

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The ability to grow food to nourish the human population

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Wheat, corn, and rice provide most of the human diet.

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If the environment isn't taken care of, it won't be able to produce the amount and quality of food necessary to supply the growing population on Earth.

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Atmospheric gases, called greenhouse gases, trap heat near Earth's surface. Carbon dioxide contributes the most to the warming of Earth's atmosphere.

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Technology has allowed us to dramatically increase the production possibilities and speed up the process.
Ex: Processed foods, juice, sodas

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It exists on three scales: ecosystem, species, and genetic

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Throughout most of Earth's history, greenhouses gases have been present in the atmosphere at a relatively constant level. However, in the past two centuries, the concentrations of carbon dioxide and other greenhouse gases in the atmosphere have risen drastically.

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ex. forrest (ecosystem) to deer (species) to DNA (genetic)

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some measures of biodiversity are given in terms of land area.

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Resources can be categorized as either finite or infinite and are either renewable or nonrenewable. Coal, oil, and copper are examples nonrenewable which means that there is a set amount that cannot be regrown. Timber or fish are examples of renewable resources which means that they can be restored. The issue with these resources is that the demand for these is exceeding the rate at which they can be replenished. Sustainability is important because future generations need resources that are in short supply as well.

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Genetic diversity is all the different genes contained in all individual plants, animals, fungi, and microorganisms.

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When greenhouse gases are at a constant concentration, they help keep Earth's surface within the range of temperatures at which life can flourish.

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current loss of biodiversity indicates that natural systems are facing strain unlike any in the recent past.

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Biodiversity is often measured as the species count in a given area

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Need another for purple

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Today, atmospheric carbon dioxide concentrations are greater than 400 parts per million (ppm).

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eco system determination: precipitation and temperature

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can differentiate ecosystems by temp and perception.

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species diversity has to include all organisms- animals, plants, fungi, etc

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Scientists believe that the increase in carbon dioxide within Earth's atmosphere is anthropogenic (caused by humans/human activities).

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News: not good news- fewer species now bc extinction

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populations in Italy have been decreasing because women are becoming more educated, decreasing the amount of children born. populations are directly connected to the education of women

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greenhouse effect can be a good thing because it keeps are temperatures in a good range. However, it can be bad thing because the production of gasses can cause the ozone layer to trap the heat in the earth.