Taxing international travel would be an option to help fund international development. The United Nations could oversee such a tax. Taxes could only be administered among flights that take off and land between countries that approve of the tax. The tax is a way to help fund development in Third World nations of Asia and Africa to provide infrastructure and much needed health aid in order to support a healthier population and more educated work force in today's global economy.
Citizens of developed countries already pay a large amount of money for development aid and miitary aid in third world and developing countries, and an additional aviation tax is unneeded. An aviation tax would only serve to hurt the opportunities to travel of the middle class, as wealthy business people have flights paid by companies.