The phrase 'contributed to reducing' is correct and can be used in written English.
You can use it when you are talking about how something helped to make something else become smaller or fewer. For example, "The efforts of our team contributed to reducing our environmental impact."
The above-ground grass parts primarily contributed to reducing overland flow rate and velocity, with mean relative contributions of 64% and 86%, respectively.
Furthermore, usurious loans by Japanese rice dealers contributed to reducing the peasantry to abject poverty.
In both countries, female workers' increased skill levels contributed to reducing the gender wage gap.
Emerging digital technologies for healthcare information support have already contributed to reducing the digital divide among rural communities.
The answer is that the government's policy of engagement has contributed to reducing military tensions and deterring hostilities on the Korean Peninsula and noticeable changes within North Korea.
Concurrently, these rotations contributed to reducing the weight on the standing leg, and thus facilitated foot unloading at the end of the stance phase.
Additionally, nCaCO3 content contributed to reducing the particle domains of PLA by decreasing the interfacial tension between green HDPE and PLA.
Similarly, there has been a shift in weight from existing owners and existing properties to first-time buyers and new-builds - which has also contributed to reducing the UK average".
"Since starting [the programme], all women have delivered HIV-negative babies, which has contributed to reducing child mortality in this area," says Fanny Luwemba, a buddy volunteer in Sandi village.
Suharto's economic policies and, in particular, the attempt to spread development more evenly across the archipelago contributed to reducing the strong regional feelings of the 1950s, although there remained perceptions that the regime was dominated by Java.
As Mr. Ahmad said after the news conference in Cairo: "The changes in the Arab region and the political upheaval contributed to reducing the pressure on the Palestinian factions, and by pressure I mean the negative kind of pressure".
