A common person often mentions toxic substances.
This indicates his Level of perturbness as these substances, especially those  that are man made are found in and around including plants, animals, food, beverages, agricultural and horticltural products,  medicines and virious types of industrial products.
There seems to be the urgent need of understanding the basic prinicples that  will help a common person to handle these substances, as day by day these toxicants are becoming more effectively dangerous as  compared to the natural poisons from animals and animals and plants.
These basic priniples are from chemistry, physics,  botany, zoology, microbiology, grography, sociology, enthnology, politics, enviromental sciences etc.
 Currently, toxicology is one of the most discussed topics globally including media, politics NGOS etc.
It has found its most  deserving place in the curricula of the universities.
 An effort is made to eludate the different aspects, which are dirctly or indirectly are Linked with toxicology.
Apart from student  community, those who are keen to understand the complexity of toxicology may find it useful and interestimg effort.