Tuesday, July 10, 2012

Rachel Carson: Raising Awareness on Environmental Health


Rachel Carson was the pioneering force behind raising awareness on the rising issues of the impact that humans were having on the environment and how these effects would eventually harm them. Through her book Silent Springs, Carson pointed out key facts on how industrial activity affected the environment.  Some of the main issues she addressed in her book were the unmonitored use of pesticides high in DDT and how once introduced into the ecosystem would eventually affect organisms as well as the food chain.  In the book, Carson discussed a number of case studies that showed the effects of chemical pesticides on the environment. She tells of how the pesticides not only aid in getting rid of pests but have also contributed to long term health effects on humans, one of the main ones being cancer. She also stressed on how harmful effects may not be observed immediately and could be incorporated deeply into natural systems and affect future generations.

Prior to the eye opening observations stated in her book, the environmental health movement of that period (60’s and 70’s) was not very forthcoming and there was not much thought to the long term effects of human actions on the earth.  

Although the book caused a lot of controversy, it also contributed to the government taking positive steps into started the Environmental Health movement as well as developing legislation and agencies that would ensure that the use of chemicals were regulated.

I feel that Silent Springs was very effective in the present environmental health movement because of the fact that she used real life examples of how pesticides affect the environment. She uses examples of effects of DDT on certain aquatic organism populations in parts of the country and how once one organism is affected, it causes a chain effect of negative consequences. 
Another reason I feel the book was effective was that Carson did not advocate for the banning of pesticides but she called for further investigation into its effects on human health. In a way, this may have spurred fear in the hearts of the population as little medical research had been conducted to determine the long term effects of constant exposure on the body.

Tuesday, June 26, 2012

Map Types

This is a choropleth map that is investigating the quality of life in Brazil. The greater the
density of  shading, the greater the density of the population.  For example, states
with the greatest percent of total population above 65 years are shaded in the darkest tone; those
with the lowest percent above 65 years are shaded in the lightest tone.



This is a dot density map of the population of Brazil.

The dots on the map represent the distribution (specific quantity) of the population in each area of the country.





This is a proportion symbol map of the population of the state of Georgia in 2000. Each dot represents the population proportion in each region of the state.





This is a topographic map of the country of Botswana. This kind of map shows contours of the region. It also shows bodies of water.





This is an Environmental Sensitivity Index map (ESI map) of the Carribean.  They determine what kind of resources are available in the region