The increasing uses of science, technology and unawareness of the negative sides of these two brought different issues. Mother Earth is threatened by human behaviour. In this scenario, the most required thing is having ideas of environmentalism and promoting the awareness as well as doing sustainable activities. Environmental awareness is having sense about the environment and natural resources. We have to understand the impacts of our each and every activity. Numerous ways are there to promote environmental awareness, one among all is promoting through schools and students. The researchers want to analyse the effect of Environmental awareness on the attitude of school students. For this, one key factor is sustainable behaviour. The researchers took 200 sample from North 24 parganas and Nadia district, through stratified random sampling. Among these 200 samples, 100 were boys and 100 were girls. 100 students were from urban area and rest 100 were from rural area. The result unfolded that there is a positive relationship between environmental awareness and sustainable behaviour.