If you are buying currency to spend locally then you can convert here easily sterling or dollars for the dirham at the currency exchnge. You cam also use the dollar widely here as we are pegged to the dollar at 3.67 AED to the US $.
Your carbon footprint is basically the sum total of all your actions and decisions and the impact they have on the environment through carbon emissions. How you live, eat, shop and travel all impact the size of your footprint. So now you know the size of your footprint.
This is particularly important if you are not a smoker and are against the idea of smoking, because it suggests there are negative influences in your life that are leading to stress. Whether this is a behaviour or a situation, you need to work out what it is and how you can reduce its impact on your life.