What are two major hazards involved in handling and storing materials?

The 2 major hazards being involve in the handling as well as storing of materials would be the bulkiness and the weight of materials. There are times that handling of a heavy object would result in a back pain and spinal injuries.

Two major hazards which are involved in handling and storing materials may include the weight of materials and bulkiness. Handling bulky and handling heavy objects may result in spinal and back injuries.
Workers that lift heavy objects may suffer from chronic and acute back pains. Certain types of incidents with major hazard facilities can be catastrophic for workers, the environment and to the community.

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What do you mean about innate behavior i don’t get it