The phrase "a problem which affects" is correct and usable in written English.
It can be used when discussing an issue that has an impact on someone or something.
Example: "Climate change is a problem which affects not only the environment but also human health and economies."
Alternatives: "an issue that impacts" or "a challenge that influences".
The violent crime figures show that despite the long downward trend in violent crime, domestic abuse remains a widespread problem which affects more than 8.5% of women and 4.5% of men every year, according to results from a special module within the survey.
Fouling is a complex problem which affects thermal equipment.
Chemical wear during high speed machining of titanium alloys is a serious problem which affects the surface integrity of both the tool and workpiece.
"What was once thought to be a public sector problem has now become an NHS problem, which affects the tax payer and therefore the government should be looking at this".
Diabetes is an increasing problem which affects approximately 371 million people worldwide [ 1].
Its degeneration represents a serious medical problem which affects many people worldwide.
The discharge of effluents containing heavy metals into water resources is a serious pollution problem which affects the quality of water supply.
This is a well-known problem which affects ML-systems and was first described in the context of connectionist networks [84]; natural cognitive systems rarely completely disrupt or erase previously learned information, i.e., natural cognitive systems do not forget "catastrophically" [85].
Essential hypertension (EH) is a major global public health problem which affects a large proportion of adult population worldwide.
This paper introduces a VNS based local search for solving efficiently a financial portfolio design problem which affects assets to portfolios, subject to a compromise between maximizing gains and minimizing losses.
