Over the past two years, the French and Spanish police have been discovering the extent to which rubbish is illegally smuggled across the border. The phenomenon has long plagued Italy, where the mafia organises the trafficking, and is now reaching France and Spain.

Recent droughts in Colombia and Ecuador have severely hampered energy supplied by hydropower. Can the cheap, low-carbon renewable still thrive in an increasingly hot and dry world?

Dust storms that carry particles from the Sahara into European capitals are more common than you'd think. Here's what you should know about them and how to keep yourself safe.