— In this video Paul Andersen explains how energy flows in ecosystems. Energy enters via producers through photosynthesis or chemosynthesis. Producers and consumers release the energy from food through cellular respiration. An explanation of gross primary productivity and net primary productivity are included. Energy and biomass in ecological pyramids show energy efficiency. — — Transcript…
Stratospheric Ozone
In this video Paul Andersen explains how stratospheric ozone protects humans from ultraviolet light.
In this video Paul Andersen explains how stratospheric ozone protects humans from ultraviolet light.
Solid Waste
— In this video Paul Andersen explains the basics of solid waste including trends over time, basic composition, and disposal. A brief description of the three R’s (reuse, reduce, and recycle) is included as ways to minimize waste. Legislation including RCRA and CERCLA (the Superfund Act) were enacted to deal with hazardous waste. A description…
Ecosystem Ecology — 007
In this video Paul Andersen explains how ecosystems function.
In this video Paul Andersen explains how ecosystems function.
Population Ecology — 012
In this video Paul Andersen explains how population ecology studies the density, distribution, size, sex ration, and age structure of populations.
In this video Paul Andersen explains how population ecology studies the density, distribution, size, sex ration, and age structure of populations.
Air Pollution
— In this video Paul Andersen explains how air pollution is any chemicals in the atmosphere that negatively affect human health. Primary pollutants (like CO, VOCs, NOx, SO2, PM, and Lead) as well as secondary pollutants (like Ozone, nitric acid, and sulfuric acid) are included. Regulation of air pollution and technology can mediate the health…
Energy Concepts #22
— In this video, Paul Andersen explains the different forms and units for energy. A discussion of the laws of thermodynamics is also included. Sample conversion problems using dimensional analysis is also included. — — Transcript Provided by YouTube: 00:03 Hi. It’s Mr. Andersen and this is environmental sciences video 22. It is on energy…
Environmental Economics #21
— In this video Paul Andersen explains how economic models, like supply and demand, can be applied to environmental systems. The market forces will not protect environmental services until proper valuation and externalities are established. The wealth of a nation can be more accurately measured through the sustainability of the economic model. — — Transcript…
Fishing #20
— In this video Paul Andersen explains how various techniques have been used for years to collect seafood. Commercial fishing has led to overfishing in certain areas and species due to the tragedy of the commons. An explanation of aquaculture and sustainable fish yield is also included. — — Transcript Provided by YouTube: 00:00 Hi.…
Land Use #18
In this video Paul Andersen explains how land is developed for human use. Urbanization has occurred through the last century as people have moved to cities in large numbers. Transportation and the arrival of the car have led to urban sprawl and urban blight. Smart growth can be used to mediate some of the ecosystem…
Soil and Soil Dynamics
— In this video Paul Andersen explains how soils are formed and classified. Weathering of rock creates particles which are mixed with water, air, and organic material. Soils are classified according to particle size, chemical makeup, and horizon distribution. A brief discussion of soil loss through erosion, compaction, and salinization is included. — — Transcript…
Mining #19
— In this video Paul Andersen explains how mining is used to extract valuable minerals from the Earth’s crust. Surface and subsurface mining are used to extract ore which is then processed. A discussion of ecosystem impacts and legislation is also included. — — Transcript Provided by YouTube: 00:03 Hi. It’s Mr. Andersen and…
The Environmental Pros and Cons of Industrial Agriculture — 016
In this video, Paul Andersen describes the pros and cons of industrial agriculture including: monocropping, irrigation, and the use of pesticides, fertilizers, and GMOs.
— — — Transcript provided by YouTube: Hi. It’s Mr. Andersen and this is environmental science video 16. It is on agriculture. This is a picture of wheat. We grind it to make flour and then make things like bread. And we have been doing so for thousands of years. This sickle is over 5000…
Forestry and Rangelands
In this video, Paul Andersen explains how forests and rangelands are managed to provide renewable lumber and cattle.
In this video, Paul Andersen explains how forests and rangelands are managed to provide renewable lumber and cattle.
Water Resources – 005
Freshwater is divided between surface water and groundwater but must be stored and moved for domestic, industrial, and agricultural uses.
Freshwater is divided between surface water and groundwater but must be stored and moved for domestic, industrial, and agricultural uses.
The Atmosphere – 004
The state of the atmosphere is climate and is affected by unequal heating, the Coriolis Effect, and the ocean. Convection cells and ENSO are discussed in detail.
The state of the atmosphere is climate and is affected by unequal heating, the Coriolis Effect, and the ocean. Convection cells and ENSO are discussed in detail.