Purchase DVD here http://www.greatpacificmedia.com/
Segment from the program How Ecosystems Work: Energy Flow and Nutrient Cycles.
DVD Description
Looks at the processes that are fundamental to all ecosystems. First the concepts of primary productivity, trophic levels, food chains, energy pyramids and the flow of energy through ecosystems are introduced. The program then explains how carbon, nitrogen, phosphorous and water cycle through ecosystems and how human activities can disrupt these cycles and throw them out of balance leading to accelerated eutrophication in lakes in the case of phosphorous imbalances and global warming in the case of carbon imbalances.
WORLD RECORD: BIGGEST WIND TURBINE
Visit: windturbinecarriedbywheels.weebly.com
ZERO-NOISE from gears and generators since they are sealed underground.
SAVES THE BIRDS AND BATS since slow-moving.
DOES NOT OCCUPY A WIDER LANDSCAPE since the turbine can be very tall.
MAY BE LOWER-COST since it may use timber and other cheaper things.
ELUDES HURRICANE FORCE since the V-type folding blades automatically close.
NO FIRE since well-cooled.
HELPS WIND-ENERGY COMPANIES since it is FREE FOR ALL.
TheServiceWeb 1 month ago
@aparna25765
aparna25765 1 month ago
nice
aparna25765 1 month ago
Great video for my biomes and ecosystems essay!Thanks,it really helped me.
martinshewfelt1236 1 month ago
thank you help me alot! :)
JannyAquaGirl 3 months ago
1:52 what a boss animal
Thatsarahgurlley 3 months ago
PLS TELL ME THE REVIEW OF THIS VIDEO AND WHAT ITS ABOUT
2mexicanmoose 4 months ago
fancy video
ngocan17531 4 months ago
0:13 lol
nhiphop89 5 months ago
also me give me an important concpet of this video,,,,,,,,
idonno1111 8 months ago