you mentioned a kind of bike racing earlier; what are its risks?
Injuries range from minor wounds, such as cuts and abrasions from falls on gravel or other surfaces, to major injuries such as broken bones, head or spinal injuries resulting from impacts with rocks, trees or the terrain being ridden on
Mountain biking
Injuries are a given factor when mountain biking, especially in the more extreme disciplines like downhill biking, free ride and dirt jumping. Injuries range from minor wounds, such as cuts and abrasions from falls on gravel or other surfaces, to major injuries such as broken bones, head or spinal injuries resulting from impacts with rocks, trees or the terrain being ridden on. Another risk factor is that mountain biking takes places in wilderness area so emergency response will be delayed in case of injury. 

where is cobalt located on the periodic table UNANSWERABLE is it a metal? It is a chemical element with the symbol Co and atomic number 27 how is it extracted? Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal what role it plays as a biological agent? It is essential to the metabolism of all animals and how it affects the animal? In the early 20th century, cattle suffered from what was termed "bush sickness", it  was discovered that the volcanic soils lacked the cobalt salts essential for the cattle food chain and in general does it also affects the health of human beings? Yes, chronic cobalt ingestion has caused serious health problems at doses far less than the lethal dose. the disease that the cattle suffered from; did it happen around any particular region? Yes, North Island Volcanic Plateau of New Zealand is this area under any kind of threat? Yes, the lowland areas are quite highly populated and therefore urban development, agriculture and forestry are a major threat to natural habitats there. what cultural references it have? Tourism is an economic mainstay of the region with a wide range of largely outdoor attractions from trout fishing, flyfishing on Tongariro River or harling on Lake Taupo, tramping, Mountain biking centred on National Park, deer or pig hunting, horse riding to snowskiing/boarding on Mt Ruapehu is this area used for any kind of rally? Yes, motorcycle rally what is this rally can you explain? A motorcycle rally is a gathering of motorcycle enthusiasts which other countries support it other than this country? Germany, Australia, New Zealand, etc. you have mentioned about a river earlier; what else is it used for other than fishing? UNANSWERABLE what else is the aforementioned chemical substance applied to? Cobalt has been used in the production of high-performance alloys, it is used to make rechargeable batteries, and the advent of electric vehicles
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Mountain biking [SEP] Risks
To reduce the risk of injury, a rider must also take steps to minimize the risk of accidents, and thus the potential for injury; by choosing trails which fall within the range of their experience level, ensuring that they are fit enough to deal with the trail they have chosen, and keeping their bike in top mechanical condition. If a mountain biker wishes to explore more dangerous trails or disciplines, such as downhill riding, they must learn new skills, such as jumping and avoiding obstacles. It can be a huge risk if certain obstacles arise and should be something to take into consideration when thinking about taking on extreme mountain biking course.