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Conservation Biology

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A series of free High School Biology Video Lessons.

Climate Change
Climate change is defined as the long term change in weather patterns over time. The greenhouse effect is the trapping of heat in the Earth by gasses like carbon dioxide and some scientists argue that increases in atmospheric greenhouse gases will trap more heat. When more heat is trapped, there is more energy to drive weather patterns. This increased heat can also have unpredictable effects such as the melting of ice caps, shifting rainfall patterns and more powerful storms
This video that explains how scientists have arrived at the current state of knowledge about recent climate change and its causes.
The atmosphere is the layer of air that surrounds the Earth and is comprised mainly of Nitrogen and Oxygen. The atmosphere also contains traces of gases like carbon dioxide, neon, helium, etc. There are 5 main layers of the atmosphere: the troposphere, the stratosphere, the mesosphere, the thermosphere and the exosphere.
National Geographic - Earth's Atmosphere

Learn about the composition and layers of the Earths atmosphere.
A journey through the layers of the atmosphere from the 2007 BBC documentary Earth the Biography. Including the longest free fall ever.

Endangered Species
Endangered species are defined as a species that is in immediate danger of going extinct. Species become endangered through a number of factors including disease, human activities and competition with other species. Examples of endangered species include the mountain gorilla and the black rhino. Another category is something called a threatened or vulnerable species. These are species that are in danger in the near-term.
Vanishing Species - Biological Diversity and Conservation

This video introduces the topic of biodiversity, and talks about why biodiversity is important.It also discusses about threats to biodiversity for example, habitat loss, habitat fragmentation and habitat degradation.
Conservation of Bodiversity
How to protect biodiversity.

Sustainable Development
Sustainable development is the usage of natural resources for human needs in a way that preserves the environment that produces those resources so they can be used in the future. Scientists argue that sustainable development has many benefits and that it maintains biodiversity, ensures future resources for economic stability, encourages greater efficiency and often reduces the impact of natural disasters.

Try the free Mathway calculator and problem solver below to practice various math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
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