airport of Karachi, Jinnah International Airport (also known as Quaid-e-Azam International Airport) is the largest and busiest airport in Pakistan and handles 6 million passengers a year. The airport also receives the largest number of foreign airlines; a total of 27 airlines fly to Jinnah International, predominantly from the Middle East and South East Asia. All of Pakistan's airlines use Karachi as their primary hub, including Pakistan International Airlines, Aero Asia International and Airblue. Fisheries Karachi is the biggest fishery hub in Pakistan. Fisheries play an important role in Karachi's economy. They provide employment to about 300,000 fishermen directly. In addition, another 400,000 people are employed in ancillary industries. It is also a major source of export earning. The Karachi Fish Harbour and Korangi Fish Harbour are two major fish harbours in Karachi. Fish are one of Karachi's main exports. Challenges Karachi is allegedly the worst affected by controversial population census '17 placing it at 14.91 million, whereas all estimates and reality checks point above 30 million. With about 1100km2 of city proper, the population density would stand beyond 30,000 per km2, thereby ranking it at least 6th most dense city proper. The courts have been moved on the matter of 5% census audit. As of Q1-2021, even 2017 census is not published due to controversies and litigation. That alone causes a spread of issues branching from flawed allocation of funds and representation in Parliament to housing, to mass transit, to environment and just about every facet of life in urban and suburbs. Beyond that the city faces governance crisis bound by provisions of 18th Amendment in Constitution of Pakistan, giving all local body formation powers in hand of Province, with absolutely no room for intervention by federation; Rendering it a provincial dictatorship. Sindh Local Government Act 2013, thereby took away major municipal authorizations from Karachi Metropolitan Corporation under Mayor's Office, including planning and development, building control, solid waste management, water supply, sewerage and the like. Beyond centralizing powers, the city, formerly a district, was declared a division, towns abolished in favor of independent districts, the count standing at 7 as of September 2020. This, along with presence of 6 cantonment boards covering allegedly at least 60% of city, introduced a divide in city's management and thence centralizing the co-ordination in hands of provincially administered bodies; The damage of which was evident from chaos prevailing after August 2020 record rains