The phrase 'has a growing interest' is correct and usable in written English.
Example sentence: The new video game has a growing interest, as more people play the game every day.
But that is bound to mean that China has a growing interest in India's near-abroad.
In fact, the regime has a growing interest in the non-state economy.
However, goat husbandry has a growing interest among farmers, partly because cropping has become risky and less profitable.
Best Buy has a growing interest in the mobile industry, as evidenced by its Best Buy Mobile stores.
The pharmaceutical industry has a growing interest in alternative manufacturing models allowing automation and continuous production in order to improve process efficiency and reduce costs.
It shows that Apple has a growing interest in the data flowing through networks like Twitter, which is a refreshing notion.
"We have a growing interest in the top level of the international game — the English Premier League, the World Cup.
Even with predicted growth of 50 per cent this year, he acknowledges their freight efforts are "a drop in the ocean", but added: "People have a growing interest in wind power".
He had a growing interest in the stock market, and with the bull market raging in the late 1990s, he left the law.
Stakeholders therefore have a growing interest in understanding the possibilities for reducing embodied impacts in buildings.
