As example, for our own events, we don’t use any printed materials or single use plastic. Instead, we use mobile apps, conference badges from recycled materials, reusable tote bags and we always encourage our clients to think sustainably. The principles of sustainability are: the economy, society, and the environment. These principles are HESA's guiding moto and they represent programs, initiatives and actions we develop with our partners without compromising the ability of future generations to meet their own needs.