European critical loads: database, biodiversity and ecosystems at risk Approximately 79 percent of the nature reserves (Natura 2000 areas) in EU countries are estimated to be exposed to an excess of nitrogen deposition in 2020.
Assessment of health effects of alternative tobacco products To assess the effects on the health of users of alternative tobacco products, more knowledge is required about the composition of the product, the smoker’s behaviour (such as the amount of cigarett