Saudi Arabia builds world’s largest airport in Riyadh, set to open by 2030 with six runways and capacity for 185 million passengers.

Here's what to know about how successful the efforts to recycle and cut plastic production have been and the challenges that come with them.

Saudi Arabia has begun construction on what is set to become the world’s largest airport. The new hub, King Salman International Airport, is scheduled to open in 2030 and will cover an area equal to ...