Earth Day may only happen once a year, but Hollywood’s eco-savviest stars celebrate the do-good event year-round by regularly opting for green-conscious choices over wasteful (and environmentally harmful) pursuits. Whether it’s replenishing themselves with thermoses instead of bottled water, cycling instead of driving, or even gardening and composting their own vegetables, these celebrities are setting an earth-friendly example for budding environmental activists everywhere. In honor of Earth Month, click through our slideshow to see how Shailene Woodley, Aubrey Plaza, Gwyneth Paltrow and more are greening their routines.