 And I think we'll all agree that many of these changes are here to stay. So the workplace is and will be a mosaic of hazards. Because of all of these different factors I just mentioned changes in work the workforce and workplace and they bring with them new hazards and risks that come at a time where we still haven't fully controlled older more traditional if you will. And at times deadly hazards and risks, and a lot of this is also modulated by phenomena they're outside the workplace, of which for example climate change is becoming it's becoming increasingly evident that things like climate change are affecting workforces, putting some workers at greater risk than others. And so all of this needs to be taken into account and the point where our colleagues at NIOSH and the University of Texas have been trying to make over these last three years is we're making a push for a transition the transition from our traditional way of approaching occupational safety and health not minimizing it but quite the to the contrary building on it. This traditional approach that recognize hazards in the workplace and have the mission of eliminated associated risk towards moving transitioning as I was saying towards a more comprehensive view the burden of work and work related adverse effects. The clear is that work related burden is much more than just hazards in the workplace so that there are multiple domains of this burden that are reflected in characteristics inherent to individual workers. And they're immediate surroundings, both inside and outside the workplace, including their family their community obviously their employers and society and general this brings us to the need to adopt a broader view of work relatedness of disease and injury distinguishing between what we have traditionally referred to as occupational injury and illness having is injured illness that it arises, causally from the workplace to a broader concept of work related injury and illness that allows for illness and injury to be work related or not work related but nonetheless reciprocally related to the workplace or having consequences with that. It's also becoming evident that our working life over it was also changing where we're moving from an era of possibly a few long stable jobs to one s worker may go through many many jobs by the time they reach the age of retirement on average anywhere from 12 to 15. And there's got to be a consequence to these periods of employment unemployment differences and hazards depending on the job that one has probably cumulatively and so there's an increased need for emphasizing the impact of all of these exposures over the entire working life to continue on. And as it starts on the traditional cornerstone of occupational safety and health. And beginning with that traditional setting or foundation we describe a need for occupational health safety and health to expand in two dimensions, first of all, horizontally to reflect the various work and non work the role and impact of work. In many ways, stopping having occupational safety and health stop at the factory fence is a bit reductionist and it's also artificial, because many of the most prevalent significant health conditions workers are not solely by workplace hazards. There are many stress related conditions that arise outside the workplace but nonetheless have an impact on work and so separation of work.