Today my topic is about the sciences and technology and about how this technology misusing and how it is changing the man kind elevation

                                   Friends all very know well about technology and there uses. we cannot example where the end this technology to stop, and there is no bounders  and end to this technology this is a process to continuing  develop the thing which should want adopt according to our usage and our comfort. If see the revalution in technology all the thing around us are the result of technology developments. all these development taken mankind to a superior way and it is grate thing but in every invention there is lot of advantage and disadvantages more over these technology will be effects very high in disadvantage, as a results of the technology the studys saying that it will be results us to change the complete sturture of mankind like in future man will like more over like alinas of short body long fingures and the big brain and the colour of the eye also will change . we enjoying all fesilitys but not keep effects to arodicats the dager, now a days to say truly there more than 4 cell phone in every home if a family have 4 members so the it numbered more then the requriments.so It is use ful have cell to all family members but actually what we doing is we using these gadget more than the usage so there is lot effect in way of loss of haring power and getting raidiation and more over wasting lot of time. Have tower around our surrounding also effects like skin elargys and headaches and weekness and main thing to say with bad pernants gets abortions and small  brids ,drongflys almost disapperd .

we know that scientists sending  satellites throw rockets for commucation and other purpose some of our friends also said very well about there use more over it also used to study about our moon and planets and univers . when satellite lunch in space some of the parts of satillites will be leave in space itself .this is called  spacedebris.

Space debris are defined as all non-functional, man-made objects, including fragments and elements thereof, in Earth orbit or re-entering into the Earth atmosphere. Man-made space debris dominate over the natural meteoroid environment, except around millimetre sizes.  

What risks to space operations are caused by space debris?

One must distinguish between debris-related risks on orbit and risks due to re-entries. in-orbit risks are due to collisions with operational spacecraft, or with decommissioned spacecraft or rocket bodies. Impacts by debris larger than 10 cm are assumed to cause catastrophic break-ups, which cause the triggering of a collisional cascading process - the Kessler syndrome. Collisions with debris larger than 1 cm would disable an operational spacecraft, and may cause the explosion of a decommissioned spacecraft or rocket body. Impacts by millimetre-size debris may cause local damage or disable a sub-system of an operational spacecraft.

Large space debris objects (e.g. spacecraft, rocket bodies or fragments thereof) that re-enter into the atmosphere in an uncontrolled way can reach the ground and create risk to the population on ground. The related risk for an individual is, however, several orders of magnitude smaller than commonly accepted risks in day-to-day life.