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?

Find these stories and much more when you grab a copy of The Guardian on Saturday.