hi,

Indian institute  of science bangalore has 5 years integrated bs+ms course on  Earth & Environmental Sciences,Biology, Chemistry, Materials, Mathematics, and Physics. admission is based on kvpy, scb channel or jee main exam score. this is the best institute for integrated course on earth science.

however since there is fewer colleges is available for integrated course, you have to do bsc first , then you may go for msc course in astrophysics or earth science course.