  The development in electronic sector has brought a remarkable change in the
life style of mankind. At the same time this technological advancement results
adverse effect on environment due to the use of toxic and non degradable
materials in various electronic devices. With the emergence of environmental
problems, the green, reprogrammable, biodegradable, sustainable and
environmental-friendly electronic devices have become one of the best solutions
for protecting our environment from hazardous materials without compromising
the growth of the electronic industry. Natural material has emerged as the
promising candidate for the next generation electronic devices due to its easy
processing, transparency, flexibility, abundant resources, sustainability,
recyclability, and simple extraction. This review targets the characteristics,
advancements, role, limitations, and prospects of using natural materials as
the functional layer of a resistive switching memory device with a primary
focus on the switching/memory properties. Among the available memory devices,
resistive random access memory (RRAM), write once read many (WORM) unipolar
memory etc. devices have a huge potential to become the non-volatile memory of
the next generation owing to their simple structure, high scalability, and low
power consumption. The motivation behind this work is to promote the use of
natural materials in electronic devices and attract researchers towards a green
solution of hazardous problems associated with the electronic devices.
