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The Agriculture is the main source of ammonia emissions. It generates around 75% of global emissions of ammonia to the atmosphere and soil fertilisation accounts for half of agricultural emissions. Ammonia emissions have a negative impact on ecosystems and human health, as it is able to accumulate both as solid particles and as an integral part of acid cases. Measures to reduce ammonia emissions can be divided into three large groups: the first group is ammonia-reducing measures in animal housing, the second group is ammonia-reducing measures during manure storage, and the third group is ammonia-reducing measures during the application of manure. Measurements of ammonia emissions were carried out in the parish of Jaunberze, which took place on 30 April and 1 May 2018. Sulphuric acid was used for acidification of pig slurry digestate. Picarro G2508 was used for on field measurement of ammonia concentrations with 1 second interval, a measurement time of one session was 400 seconds. The volume of the chamber was 60 l and was connected to the Picarro G2508 using a 10 m long Teflon tube. The measurement of ammonia emissions was with three repetitions for each measurement, with a reference error of less than 5%. Emissions were measured at different time intervals: immediately after digestate distribution, 2 hours, 4 hours and the 24 hours after digestate application. The emission of ammonia from digestate without vegetation after 24 hours was 13 kg ha-1, for acidified digestate without vegetation 8.5 kg ha -1, while the acidified digestate with vegetation within 24 hours reached 2.5 kg of ha -1 ammonia emissions, five times lower than that of non-vegetation.

In the long history of coastal people, it has proven to be multiple uses of seaweeds. Commonly used of seaweeds became as fertilizers and soil conditions, as animal and fish feed, as biomass for fuel, as cosmetics, as integrated aquaculture, wastewater treatment for the reduction of nitrogen and phosphorus compounds or for the removal of toxic metals from industrial wastewater. In coastal areas with significantly high sources of algae, withered leaves and parts of the root system of the plants, regularly washed up on the shores, where they accumulate in thick layers mixed with sand and organic residues. Despite the many benefits and seaweed contribution to the protection of coastal ecosystems, coastal municipalities every year at the beginning of the summer season are removing these deposits. Once removed from the shores, this seaweed biomass generally ends up in the landfills. The management of rich seaweed residues on the southern coast of the Baltic Sea in Sweden is aimed at the identification of the seaweed species among the coastal area and its transformation into a green alternative energy source. The present study deals with the exploration of the Baltic Sea biomass as a fuel for energy production. The sources of aquatic bioenergy are analysed, while technologies used to convert aquatic plants to biofuels will be also examined in the near future.