The phrase "adding to concern" is correct and usable in written English.
It can be used when discussing factors or situations that increase worry or anxiety about a particular issue.
Example: "The recent rise in unemployment rates is adding to concern about the economy's stability."
Alternatives: "increasing worry" or "heightening anxiety".
Clashes continued in Egypt, adding to concern that has pressed stocks recently.
In the fourth quarter, AT&T's revenue rose 3percentto to $16.88 billion, meeting analysts' expectations but adding to concern about the company's debt obligations.
Health officials discovered the country's third case of mad cow disease yesterday, adding to concern that the illness may be spreading.
The euro declined after a report showed that France's economy contracted in the second quarter, adding to concern the euro region is on the verge of recession.
BEIJING (AP) — China's economy grew even faster in 2009 than previously reported, adding to concern that the flood of stimulus spending and loans that drove its rebound left a dangerous glut of unneeded factories and other assets.
Automobile sales in Brazil fell 8percentt in April from the previous month, to 137,667 vehicles, adding to concern that rising interest rates are starting to weigh on the economy.
That worries members of Congress and science experts, adding to concerns that the president is less than friendly to science.
She is expected again to highlight problems with the tax credit system, adding to concerns that the system will become discredited without further reforms.
Earlier this month, the government told another nuclear power plant to shut down until it could bolster its tsunami defenses, adding to concerns about a possible energy shortage.
Japan's exports slumped the most in six months in July as shipments to Europe and China tumbled, adding to concerns about global demand.
