Bangladesh has a humid, warm, tropical climate. Its climate is influenced primarily by monsoon and partly by pre-monsoon and post-monsoon circulations. The south-west monsoon originates over the Indian Ocean and carries warm, moist, and unstable air. Bangladesh is one of the countries which have been significantly affected by natural disasters. Bangladesh is already vulnerable to outbreaks of infectious, water borne and other types of diseases. It has been predicted that the combination of higher temperatures and potential increase in summer precipitation may cause spread of many infectious...

Earthworm is an important factor to influence the physical feature of soil and microbial activities. Soil organic matter is a key factor for sustainable soil fertility. A good combination of soil components: earthworms, physical factors, chemical factors and microbial factors are essential for sustainability of soil fertility and environment. Bangladesh is a natural resource enriched promising delta. The weather and climate, geographical settings and environment have added more opportunity for the biodiversity as a harboring point. Recently there has been considerable interest in using...