China plans to build forest cities to tackle air pollution: http://www.bbc.co.uk/news/av/world-asia-40498186/china-s-forest-city

Boyan Slat, a young entrepreneur, tries to clean up the oceans of plastic waste:  https://www.theoceancleanup.com/

The last northern white rhino: http://www.bbc.co.uk/news/world-africa-39713327

Hans Rosling dies: http://www.bbc.co.uk/news/world-europe-38900572

End of policy 

Vegetable crisis hits supermarkets: http://www.bbc.co.uk/news/uk-38851097