Ingestion of soluble compounds of uranium can severely affect the kidneys.
Uranium is a heavy metal, as is lead, chromium, mercury, etc. As such, it is poisonous, but takes time to affect the body- usually kidneys, brain, and liver. It is also radioactive. Exposure to high levels of radiation can produce radiation sickness, cancer, and in very high levels, death.
Uranium is a toxic element. Intoxication with uranium in soluble form affect the kidneys (renal diseases may occur), so abnormality of uremia is very possible. See also: http://stinet.dtic.mil/cgi-bin/GetTRDoc?AD=ADA465204&Location=U2&doc=GetTRDoc.pdf
Copper doesn't affect uranium.
Uranium is a pollutant, toxic and radioactive. Human exposure (and also the exposure of all living beings) to uranium is dangerous without precautions. The effect of uranium depends on concentration, quantity, chemical and physical form, isotopes, etc.
Uranium is toxic and radioactive; without precautions uranium can be an important pollutant near the mines or uranium plants.
A bigger concentration of uranium in water.
Uranium ores can be in the future an important ressource of Chad.
no
Uranium is toxic and radioactive for all the people, not specially for pregnant women.
kidneys
yes
No, it shouldn't.