For over 20 years, the UN conference on climate change chained themselves, without success. What will happen to the COP21 in Paris in late 2015? In view of this major peak, leading scientists are working for months on a number of scenarios to halve our current CO2 emissions. Ideas, solutions, they have! Will they be listened to?

For over 20 years, the UN con­fer­ence on cli­mate change chained them­selves, with­out suc­cess. What will hap­pen to the COP21 in Paris in late 2015? In view of this ma­jor peak, lead­ing sci­en­tists are work­ing for months on a num­ber of sce­nar­ios to halve our cur­rent CO2 emis­sions. Ideas, so­lu­tions, they have! Will they be lis­tened to?

Panorama talks to pilots who have almost passed out at the controls and passengers who say they've been made ill by toxic fumes. The air breathed on airliners is drawn past the engines and can become polluted by any leaks of engine oil. 'Fume events' are rare but there are no accurate figures of just how many occur each year. Panorama wanted to discover what was really in the air passengers, crew and pilots breathe on planes