Hydrogen fuel cell vehicles, rather than conventional electric ones, are expected to form the backbone of Toyota's zero emissions future.

Tokyo - Toyota, under new environmental targets, will be selling hardly any regular petrol-powered vehicles by 2050, only hybrids and fuel cells.

Toyota announced its ambitious vision at a Tokyo museum on Wednesday, promising to push governments, affiliated companies and other "stakeholders" to by 2050 reduce average emissions from Toyota cars by 90 percent compared with 2010 levels.

The carmaker has predicted that its annual sales of fuel cell vehicles will reach more than 30 000 by about 2020.

It says annual sales of hybrid vehicles will reach 1.5 million by 2020, by which time Toyota would have sold 15 million hybrid vehicles, nearly twice what it has sold so far around the world.

Conventional electric vehicles, such as the Nissan Leaf, are not part of Toyota's vision at all.