Types of Water Pollution. Toxic Substance -- A toxic substance is a chemical pollutant that is not a naturally occurring substance in aquatic ecosystems. The greatest contributors to toxic pollution are herbicides, pesticides and industrial compounds.he sources of water pollution are categorized as being a point source or a non-source point of pollution. Point sources of pollution occur when the polluting substance is emitted directly into the waterway. A pipe spewing toxic chemicals directly into a river is an example.
African Cattle. We supply two breeds of cattle from the Horn of Africa: Ethiopian Boran cattle (which have a pronounced hump) and the Somali cattle (which have a smaller hump).
From Wikipedia, the free encyclopedia. Over 800 breeds of cattle are recognized worldwide, some of which adapted to the local climate, others which were bred by humans for specialized uses. Breeds fall into two main types, regarded as either two closely related species, or two subspecies of one species.Bos indicus (or Bos taurus indicus) cattle, also called zebu, are adapted to hot climates.Bos taurus (or Bos taurus taurus) are the typical cattle of Europe, north-eastern Asia, and parts of Africa â they are referred to in this list as taurine cattle, and many are adapted to cooler climates.he Madura breed of Indonesia may have banteng in its parentage. In addition to these fertile hybrids, there are infertile crossings such as the male Dzo of Nepal, a cattle-yak crossing which is bred for agricultural work-like the mule they have to be continually bred from the parent species.