From the physical and social well-being of an individual to the functioning of an ecosystem, health has many different meanings and applications. More than just the absence of disease, health implies a state of well-being. Ever since the origin of life, physical, chemical and biological factors have impacted the health or biological status of living things. And in response life has evolved immune systems, detoxification systems and redundancies to stave off infection, disease, and toxicity. As the world becomes more interconnected, and industrialized, diseases never seen in one part of the globe now threaten to devastate human, wildlife and plant populations, while industrial chemicals now contaminate life in the most remote regions. Maintaining health, whether ecosystem, human or microbial arguably presents one of the greatest challenges of the day.
Obesity is rising steadily around the world. Convincing evidence suggests that diet and activity level are not the only factors in this trend—chemical...
Estimation of adult human biomassLast Updated on 2013-05-20 at 04:30
The energy requirement of species at each trophic level is a function of the number of organisms and their average mass. The study estimates global human biomass, its... More »
European Environmental AgencyLast Updated on 2013-05-15 at 16:30
The European Environment Agency (EEA) is an agency of the European Union (EU) established to function as a major source of information and data to be used in developing,... More »
MalariaLast Updated on 2013-05-04 at 14:55
Malaria is a mosquito-borne disease caused by a More »
HerbicideLast Updated on 2013-04-29 at 02:09
A herbicide is any of a number of chemical substances intended to kill vegetation. Since the vast majority of herbicides are non-selective in their lethal action, there may be... More »
TissuesLast Updated on 2013-04-05 at 19:26
There are only four types of tissues that are dispersed throughout the body: epithelial tissue, connective tissue, muscle tissue, and nerve tissue. A type... More »