Increasingly, their agricultural functions are declining in importance, while cultural and environmental roles are increasing.
As the United States, which tried and failed to broker such an agreement, begins to step back, Pakistan's role is increasing.
India's economy is only about 40% the size of China's, but its fast growth and young population mean that its global role is increasing, not least because of its thriving information-technology and outsourcing industries.
And that role is increasing right now as people worry, on one side, about inflation, on the other side, about global systemic financial risks.
It has also been suggested that its role is increasing due to better results in disease prevention, improved diagnostic tools and treatment methods.
It has also been suggested that health care may play a role, and that its role is increasing due to better results in disease prevention, improved diagnostic tools and treatment methods, and rehabilitation especially in conditions such as stroke, IHD and some cancers [ 10].
The number of pulls rats had to perform before switching roles was increased in every session until the rats kept their role as donor or receiver continuously for seven minutes.
Finally, the acceleration ratio (n-fold speedup) reached the level of 15.17 for jCE, and 15.87 for jFATCAT, when the number of instances of the Searcher roles was increased from 1 up to 18.
Intelligent purpose plays a role in adaptive behaviour, and as environments change its role is increased".
