As a result, the definition of beta diversity has become quite contentious.

The debate over how to balance diversity and fairness has already become contentious.

The war of words over the state budget has become even more contentious.

At the same time, scientists have become more contentious about ethics issues, like who has the right to be an author on a paper.

As a result, policy-making had also become more contentious and partisan.

But determining the value of those options has become increasingly contentious.

Outside of the city, access to records is becoming equally contentious.

A1 Medicare has become more contentious an issue than ever.

The relationship between the foundation and Geron, however, has become contentious.

Until then, both sides continue to blame each other in trying to explain why a budget with a $2 billion surplus has become so contentious.