Determining the age of a tree
By: Sammy Stein
Trees come in two distinct groups within the plant kingdom. The first is the monocotyledon where new growth is produced in radial lines around a central stem, like grasses, lilies, yuccas and phormiums.The second group is dicotyledons where each year, new growth is accomplished...
Should energy-conservation methods be practiced by all?
By: Janet Farricelli
Just as small jigsaw pieces placed together create a pretty puzzle, if people put some effort in preserving energy every day, our planet would be a better place for all people and future generations to come. It really does not take much to conserve energy...
Where was vanilla originally grown?
By: A. W.
Spices can give new life to bland, boring foods. Some spices have a savory taste and are used to enhance the flavor of meats or vegetables. Other spices are sweet and act as a crucial ingredient in cakes or desserts. Vanilla, with its delicate flavor...
The comparative toxicity of oil dispersants
By: Elizabeth M Young
There are four major problems with attempting to identify or to confirm toxicity in oil dispersants that are being used in the BP oil spill of 2010: Ability to prove whether it is the dispersant or the oil that is toxic; proprietary commercial secrecy about...
Why people should care about sustainability
By: Sabrina Woodroffe
The citizens of the UK need to start thinking about how they can get their act together and make sustainable development a high priority in their lives. Whether through personal or business decisions made daily, citizens make a significant impact on the futures of generations...
What are the four major desert biomes?
By: Janet Grischy
A biome is a major community of plants and animals that are adapted to specific conditions. A desert biome is a region that receives less than 50 centimeters of rain a year, sometimes much less. There are usually more reptiles than mammals in the desert...
What is the reason that rivers are straightened, and what is the effect on the environment?
By: Adelani Aderemi
It is very uncommon to see naturally straight rivers because water flows through a path of least resistance. Thus rivers meander around obstacles until they empty into another river, lake or ocean. For many reasons, human beings have devised means of straightening water courses. Straightening...
Nature controlling population
By: Altaf Sahibzada
Thomas Malthus or Robert Thomas Malthus (1766-1834), was an English demographer and political economist. He is popular for his views on population growth in his "an essay on the principle of population". His theory of population growth has been very controversial since its publication.Essentially...
An overview of green energy possibilities from the ocean
By: Steven Wengland
Rising energy costs, rumors of depleting fossil fuels, global warming, environmental toxins; it sounds like the Christmas wish list of Dr. Seuss' the Grinch. In an article in the Wall Street Journal (WSJ), entitled Electric Industry Grds for Delays In Coal, Gas Flows, it is...
Why planting trees is great for the atmosphere
By: Irrira Rikki
Every fruit eating creature of nature, plants seeds of the trees they have eaten. Even the forest and jungle trees which drop their seeds, help in the re-growth of trees.It took humans a long time to learn how important the planting of trees was...
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