In order to mitigate global warming, there is no way that the whole world could immediately convert all existing polluting petrol and diesel engine driven vehicles to electric and hybrid cars.

These latter type of cars are expensive to adopt and took great effort to produce. Therefore, it will take a much longer time for such vehicles to go mainstream.

In the meantime, all the existing petrol and diesel engine driven vehicles will still be polluting the atmosphere but these vehicles have still retained their market value and they are not easily replaceable.

Therefore, the only solution to reduce their emission of greenhouse gases by say 50% to 90% is by turning them into HHO (Hydroxy) hybrids running on both fossil fuel and water-produced gases called HHO (hydrogen and oxygen) or ‘brown gas’ which has been the tested and proven.

The technology uses the excess electrical energy produced by the vehicles' alternators to convert water into HHO or ‘brown gas’ to run the vehicles' engines. This is by installing ‘HHO generators’ made of 316L stainless steel electrodes.

Coal and gas-burning power stations could also use HHO or ‘brown gas’ (using similar technologies) as a hybrid fuel as well.

There are proven local and international companies that produce such HHO generator devices for sale and the governments of the world's nations should spearhead their adoption through tax incentives so that the whole world can achieve its goal of achieving a 40% reduction in the emission of greenhouse gases to 2005 levels or more as per committed at the recent Copenhagen Summit.

Although the Copenhagen Summit agreement is not legally binding, it is morally binding on us to save our world from further destruction by impending natural disasters caused by global warming.