The phrase "arguably increasing" is correct and usable in written English.
It can be used when discussing a situation or trend that can be debated or supported by evidence, suggesting that there is a reasonable case for the increase.
Example: "The population of urban areas is arguably increasing due to migration from rural regions."
Alternatives: "potentially rising" or "possibly growing".
We are arguably increasing services by $381 million".
In its myriad corn-related interventions, Washington has managed simultaneously to help drive up food prices and add tens of billions of dollars to the deficit, while arguably increasing energy use and harming the environment.
Norwich fielded a side unchanged from the one which drew in midweek at Southampton, while Sunderland had only one alteration from their goalless draw with Queen's Park Rangers, Martin O'Neill's, right, selection of James McClean in place of the injured Lee Cattermole reducing their combativeness while arguably increasing their creativity.
Both observations are suspiciously simultaneous with the EU's the then arguably increasing demands of a stronger commitment to democracy (ibid) and the above-mentioned Russia-Kazakhstan rapprochement, related to the unfolding Arab Spring and the Zhanaozen massacre.
The cost-effectiveness of CR has been demonstrated [ 30, 31], and arguably increasing CR capacity would provide a substantive return on investment.
This created little new market access and increased the dispersion of the tariff rates of many countries, arguably increasing the distorting effect of tariffs on their markets.
Indeed, a striking irony of this era is that the potential common ground has arguably increased.
Looking at both monetary and psychological barriers of entry to buying an iPhone, this price reduction arguably increases the value of an 8GB iPhone 3GS dramatically.
In practice, though, EU policies have had scarcely any impact on the rest of the world – indeed, they have arguably increased global emissions.
First, the veto right by the institutional investors would screen for the companies for which curbing hedge fund activism can arguably increase value.
This would arguably increase global emissions "because our coal, by and large, is cleaner than the coal in many other countries".
