Alternatively, they can import approved, non-polluting vehicles with a big discount on import duty.

ECONOMIST: A shortage of taxis in Nepal

The government sees hydroelectric dams as an alternative, non-polluting source of power generation.

FORBES: In Brazil, Protesters Shut Down World's Largest Hydro Dam Project

"Designers have an obligation to explore solutions which are by nature less energy-consuming and non-polluting, " says Clive van Heerden, senior director of design-led innovation at Philips Design.

CNN: Glowing bacteria could power 'bio-light'

Across the country, special fares were on offer in operation on public transport, exhibitions will show the effect of pollution on people and buildings, and new non-polluting types of transport will be on display.

BBC: News | Europe | Off the roads

Interested in more great non-polluting content from me.

FORBES: The Alarming Rise Of 'Digital And Content Pollution'