Whenever we burn fuels they release gases into the ____. The fuel joins onto ____ from the air when it burns. If there is plenty of oxygen it is called ____ combustion. Complete combustion makes carbon ____ which causes the ____ effect and global ____. If there is not enough oxygen it is called ____ combustion which makes carbon ____. Carbon monoxide is ____ and has no colour or ____. If the fuel contains any sulfur it will burn to make ____ dioxide. This causes ____ rain which can kill ____ in lakes and ____. When diesel burns it releases small solid ____ that block the sunlight. This is called global ____.

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