Political, religious and enviromental/pollution problems. But in all honesty, this exists everywhere. The real bad problem is overpopulation and deforestation.
what is the main economic activity in much south Asia
Malay
Indonesia is located in south east Asia, between the main Asia continent and Australia.
The three main mountain ranges in South Asia are the Himalayas, the Karakoram Range, and the Hindu Kush Range. These mountain ranges are home to some of the world's highest peaks, including Mount Everest and K2. They form natural boundaries between countries like India, Nepal, Pakistan, and Afghanistan.
The main argument against the South's desire to secede from the union is the boundary issue. There is a boundary issue on where the boundary should actually be.
South Asia is more rural than East Asia with more mountains and rivers. Farming is the main industry and there is lots of poverty. East Asia is populated with large cities and very urban.
The north considered the main issue in the war to be slavery. The south considered the main issue in the war to be state's rights. So as you see they weren't even fighting over the same issues!
The Andes mountain streams
North Ameria, some in South America and Asia.
The preservation of the union
Hinduism, Buddhism, Christianity and Islam
Hospitality and labouring