The phrase "a hazardous activity" is correct and usable in written English.
It can be used to describe an action or task that poses a risk of harm or danger.
Example: "Rock climbing without proper safety gear is considered a hazardous activity."
Alternatives: "a dangerous endeavor" or "a risky undertaking".
Super-long sleeves: 'Eating and working prove problematic' Warning: this look can make drinking coffee a hazardous activity.
Swimming was commonplace even in Manhattan, where pier diving was a popular sport, until waterfront development and pollution made jumping into the river a hazardous activity.
But working for others proved to be a hazardous activity and not to the taste of a fiercely independent businessman and motor sports enthusiast with a keen sense of risk.
Providing emergency care services in the confined space of the patient compartment of a moving ambulance has proven a hazardous activity.
It can be a frustrating or, occasionally, even a hazardous activity.
Residents developed rashes, noticed their hair was thinning, and began feeling that bathing was a hazardous activity, Edwards said.
Giving questionnaires to psychology students is not perceived as an hazardous activity that needs special screening and approval and in general, academic university staff are free to carry out such research without seeking approval.
Over the past few years, a number of epidemiological studies have made it clear that playing in the N.F.L. is a uniquely hazardous activity.
Step 2 describes the components of risks (i.e., hazards, hazardous activity, hazardous event, harm).
Four decades after scientists first recognized indoor air quality and gas-stove emissions as a health concern in many U.S. homes, relatively few people think of unvented cooking as a potentially hazardous activity, Sherman says.
Cooking is a potentially hazardous activity, and must be treated as such.
