what are its causes?
Tobacco smoking is the main known contributor and Opium consumption increases the risk by 3-fold
Bladder cancer
Tobacco smoking is the main known contributor to urinary bladder cancer; in most populations, smoking is associated with over half of bladder cancer cases in men and one-third of cases among women, however these proportions have reduced over recent years since there are fewer smokers in Europe and North America. There is an almost linear relationship between smoking duration (in years), pack years and bladder cancer risk. A risk plateau at smoking about 15 cigarettes a day can be observed (meaning that those who smoke 15 cigarettes a day are approximately at the same risk as those smoking 30 cigarettes a day). Smoking (cigar, pipe, Egyptian waterpipe and smokeless tobacco) in any form increases the risk for bladder cancer. Quitting smoking reduces the risk. Risk of bladder cancer decreases by 30% within 1–4 years and continues to decrease by 60% at 25 years after smoking cessation. However, former smokers will most likely always be at a higher risk of bladder cancer compared to people 
when did we first start using nuclear energy 1970's what is this power? It is a power that uses nuclear reactions that release nuclear energy to generate heat, which most frequently is then used in steam turbines to produce electricity in a nuclear power plant. what happens to the waste of this process? It is disposed. is it used in space ? Yes. has it faced any attacks? UNANSWERABLE where was this technology first used? United States of America any particular project in that country where this was used? Yes. The first man-made reactor, the research reactor known as Chicago Pile-1 what was its importance? The successful test of CP-1 not only proved that a nuclear reactor was feasible, it demonstrated that the "k" factor was larger than originally thought. what site was chosen for this? A suitable location long, wide and high, sunk slightly below ground level, in a space under the stands at Stagg Field where did the concept of this project originate from? It was first hypothesized by the Hungarian scientist Leo Szilard. He realized that if a nuclear reaction produced neutrons or dineutrons, which then caused further nuclear reactions, the process might be self-perpetuating. who was this person? Hungarian-American physicist and inventor. was he ever a faculty in any institution? No does he have any published materials? Yes. A book of short stories, "The Voice of the Dolphins" (1961) was he ever diagnosed with cancer? Yes. Bladder Cancer
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Bladder cancer [SEP] Causes
Tobacco smoking is the main known contributor to urinary bladder cancer; in most populations, smoking is associated with over half of bladder cancer cases in men and one-third of cases among women, however these proportions have reduced over recent years since there are fewer smokers in Europe and North America. There is an almost linear relationship between smoking duration (in years), pack years and bladder cancer risk. A risk plateau at smoking about 15 cigarettes a day can be observed (meaning that those who smoke 15 cigarettes a day are approximately at the same risk as those smoking 30 cigarettes a day).