Ambrosia artemisiifolia (common ragweed) is an invasive weed with rapid spread during the last decades in many European countries, representing an important problem for the environment and for public health, due to its highly allergenic pollen. Data from the European Aeroallergen Network (EAN) confirm the continuous increase of infested areas and of the atmospheric ragweed pollen load. A. artemisiifolia is responsible for significant health and economic impact in the most infested areas from Central Europe, mainly Hungary and neighboring countries, including Romania. Despite generally occurring in dry and abandoned fields, along railways and roadsides, Ambrosia is now recognized as part of urban vegetation in some big cities, contributing to increased risk of air pollution and of respiratory diseases. The aim of our paper is to review the data regarding spread and problematic of Ambrosia in some big cities of Romania, mainly the capital and the actual public activities undertaken to reduce its consequences. Our data showed that Ambrosia is a real and increasing danger for human health in Romania, mainly due to its rapid spread in urban environment and increasing number of affected persons. There is an urgent need for more coordinated efforts and sustainable management of this problem, to reduce impact of Ambrosia in urban environment, to establish a national aerobiology network and to continue collaboration with European institutions and specialists in this field.

Ragweed pollen is an important component of biological pollution in the urban environment, responsible for increasing respiratory allergies and significant contribution to the health impact of air pollution in the Bucharest area. The aim of this paper is to present the eight-year ragweed pollen monitoring data from Bucharest, to place them in the context of local air pollution, public health regulations and available data on the health impact of ragweed pollen in the urban environment. Our pollen data were correlated with major air pollutant concentrations and with meteorological factors in a recently published local paper and the clinical data of patients with ragweed-induced respiratory symptoms were collected and published in 2019. The ragweed pollen monitoring data, correlated with field data reported by patients and plant specialists confirm the rapid spread of Ambrosia in the Bucharest city area, in addition to some stringent environmental local problems due to air pollution. The number of patients addressed to allergists almost doubled from one year to another, confirming the real alarming health impact of this environmental hazard. Our study confirms the need for more coherent strategies to control ragweed spread, based on application of existing local and international regulations, air pollution control and evaluation of consequences on human health.

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