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Radium, like radon, is radioactive and is found in small quantities in nature and is hazardous to life if radiation exceeds 20-50 mSv/year. Radium is a decay product of uranium and thorium. [2] Radium may also be released into the environment by human activity: for example, in improperly discarded products painted with radioluminescent paint.
The general effects of radon to the human body are caused by its radioactivity and consequent risk of radiation-induced cancer. Lung cancer is the only observed consequence of high concentration radon exposures; both human and animal studies indicate that the lung and respiratory system are the primary targets of radon daughter-induced toxicity ...
This increases the risk of harm, as the radon daughters can cause damage to lung tissue. [5] Radon and its daughters are, taken together, often the single largest contributor to an individual's background radiation dose, but due to local differences in geology, [6] the level of exposure to radon gas differs by location. A common source of ...
The main causes of water scarcity in Africa are physical and economic water scarcity, rapid population growth, and the effects of climate change on the water cycle. Water scarcity is the lack of fresh water resources to meet the standard water demand . [ 55 ]
Climate change is driving extreme weather By all accounts, the last few years have been brutal for the climate — and for the humans and other living things within it. Around the globe, heat ...
Climate change is altering the geographic range and seasonality of some insects that can carry diseases, for example Aedes aegypti, the mosquito that is the vector for dengue transmission. Global climate change has increased the occurrence of some infectious diseases. Infectious diseases whose transmission is impacted by climate change include, for example, vector-borne diseases like dengue ...
Climate change in Africa is an increasingly serious threat as Africa is among the most vulnerable continents to the effects of climate change. [ 1 ] [ 2 ] [ 3 ] Some sources even classify Africa as "the most vulnerable continent on Earth".
The American Association for the Advancement of Science adopted an official statement on climate change in 2006: "The scientific evidence is clear: global climate change caused by human activities is occurring now, and it is a growing threat to society. ... The pace of change and the evidence of harm have increased markedly over the last five ...