Living beings have been devastated by environmental pollution, which has reached its peak. The disastrous pollution of the environment is in large part due to industrial wastes containing toxic pollutants. The widespread use of chromium (Cr (III)/Cr (VI)) in industries, especially tanneries, makes it one of the most dangerous environmental pollutants. Chromium pollution is widespread due to ineffective treatment methods. Bioremediation of chromium (Cr) using bacteria is very thoughtful due to its eco-friendly and cost-effective outcome. In order to counter chromium toxicity, bacteria have numerous mechanisms, such as the ability to absorb, reduce, efflux, or accumulate the metal. In this review article, we focused on chromium toxicity on human and environmental health as well as its bioremediation mechanism.

India is the second country in tobacco production in the world. Smoking tobacco products included Hookah, Cohutta, Chillum, Chillum, ganja, Beedi, Mava, Cigarettes, and cigar etc. Various types of smokeless tobacco like betel quid, khaini, mishri, snuff, gutkha are used. Fifty percent of them are addicted to smokeless tobacco. Sixty eight smokeless tobacco products were available in 2010; most of them included the risk of cancer warning except for loose tobacco products. Women mostly prefer 8 out of 29 gutkha brands. Out of these 29 gutkha brands, 15 were loose tobacco packets. India is the second-largest tobacco consumer, comprises of 27.5 crore consumers which altogether greater than the population of Western Europe. From among these 27.5 crore consumers, 16.4 crore people are smokeless tobacco in takers, 6.9 crore people are exclusive smokers and 4.2 crore people are both tobacco in takers and exclusive smokers. If we take this data into consideration early mortality of 45 crore people is expected by 2050 worldwide. Female basically are prone to fewer cigarettes per day as compared to males. On the other hand, a cigarette that is consumed by females has lower nicotine content as compared to males. In developing countries, the female population has less prevalence of smoking because the level of employment is low, socio-cultural norms, and health and beauty concerns. According to the estimation by the South East Asia Region (SEAR) in the year 2000 basically from India, we encounter death of about 18% men and about 3% of women due to tobacco. Various policies have been set up to control the use of tobacco. So that threat to public health is reduced. Policies like tobacco control policy, pro-health policy are set up for this purpose. Talking about the effects on a longer-term usage of water pipe can add up to the risk of getting affected by cancers of lungs, mouth, bladders, atherosclerosis, cardiovascular and pulmonary diseases, tooth extraction, etc.

Coral reefs are a sundry subaqueous ecological community, combined with the calcium carbonate structures secreted by converting the carbon dioxide present in the water into limestone. The biotic portion of the coral reef is marine animal known as polyps that have resemblance with jellyfish. Unlike terrestrial environment, the marine component is tightly interdependent. Taking out one component or loss of from a system can have a devastating impact or undermine the entire marine ecosystem. Reefs specifically are a vital organism among underwater life which is dependent on corals and provide key microhabitat, shelter and breeding ground for thousands of species of fish, crustaceans, mollusks, etc. Coral reef possesses vital ethnobotanical properties, which cures asthma, arthritis, and even cancer. Apart from medicinal properties, further it provides 2/3rd of oxygen on earth. However, the destructive fishing practices, pollution and ocean acidification have endangered this kingdom and have led to the threatening of the entire fabric of the underwater life. As human beings are also dependent up to much extent for centuries, there is a high probability of being severely affected if the coral reef extinct leaving the seabed barren. Corals cover almost 1 % of the oceans present on earth, but the irony is 75 % of them are on a verge of extinction. Therefore, the present review focuses on its conservation, cultivation and significance of their application in the field of biomedical science.Keywords: Coral reef, endangered, ethnobotany, extinction, marine ecosystem, pollution.