I need an explanation for all three

1. Climate change could see 4% of global annual economic output lost by 2050 and hit many poorer parts of the world disproportionately hard, a new study of 135 countries has estimated.

Rating firm S&P Global, which gives countries credit scores based on the health of their economies, published a report on Tuesday looking at the likely impact of rising sea levels and more regular heat waves, droughts, and storms.

In a baseline scenario where governments largely shy away from major new climate change policies - known as 'RCP 4.5' by scientists - lower- and lower-middle-income countries are likely to see 3.6 times greater gross domestic product losses on average than richer ones.

2. The Future Of Drones - Drone news and reviews What does the future hold for drones? How will it affect our lives? Will drones become ubiquitous? Find out in this article. Drone news and reviews

Drone Industry Outlook For the United States: 2020-2030

3. Dubai is considered the Middle East's top destination for foreign investment. The city aims to become the world's smartest city by 2021, the most visited city by 2025, and the global hub of the Islamic economy within the next decade. What are the main factors that contributed to Dubai's fast growth? What can we learn from practices used in Dubai to achieve such rapid growth and prosperity?