Swikriti Dasgupta outlines 20 small changes individuals can make to help save 20% of the environment. Some of the key changes include eating organic food, buying locally to reduce shipping pollution, reusing items, using reusable water bottles and cloth bags, installing energy efficient appliances, using fans instead of air conditioning, switching to fluorescent light bulbs, sorting recyclables, installing water saving toilets, taking shorter showers, printing double-sided, using both sides of paper, turning off power strips when not in use, growing plants, and being mindful of switching off lights and electronics when not in rooms. The document encourages readers to try implementing 5 changes themselves.