Is there a natural way to straighten curly and wavy hair without using any straightening irons or ha

Not really. You'd have to use either harsh chemicals like those found in relaxers or use heat, which can also be damaging to curly hair. But if you want to straighten your hair, use a heat protector cream or gel and blowdry with the dryer at the lowest setting possible using a round boar bristle hairbrush. Otherwise, embrace your curls and resist straighteners!

Is there a natural way to straighten curly and wavy hair without using any straightening irons or hairdryers?

blow dry it straight. get a hair dryer and a brush. put the heat on high and slowly put the brush through your hair with the dryer blowing your hair....does this make sense?? anyway, it works, try it!